oil changes

[catbert]

Whoops, sorry. But still why are people so argumentative? This forum is supposed to be fun, and helpful. Why can't subjects be discussed in a civil matter.

Why? Because this is an on-line forum, and people react differently than in "real life." Actually this is the most "genteel" forum I have run across on any subject. The moderation here tries to keep it civil, but sometimes the urge to expose the buttoxal area overcomes some members sense of civility. For a pretty large forum, CAC has no more than a half dozen participants that drop trou on a semi-regular basis. They sometimes get to go to camp or have posts deleted, but mostly forum members laugh and ignore them and carry on. They are predictable in terms of what lights their fuse, and even on the frequency of their meltdowns.

If you were to attend a CAC cruise-in, you'd have a hard time believing what you see here on line versus the same folks interacting personally.

 

[6 Shooter]

These boys are heading in for an oil change, they'll check with HH to make sure they got it right...

​

 

[jrose7004]

I thought Clowns rode around in a big shoe?

 

[Strodder]

Why? Because this is an on-line forum, and people react differently than in "real life." Actually this is the most "genteel" forum I have run across on any subject. The moderation here tries to keep it civil, but sometimes the urge to expose the buttoxal area overcomes some members sense of civility. For a pretty large forum, CAC has no more than a half dozen participants that drop trou on a semi-regular basis. They sometimes get to go to camp or have posts deleted, but mostly forum members laugh and ignore them and carry on. They are predictable in terms of what lights their fuse, and even on the frequency of their meltdowns.

If you were to attend a CAC cruise-in, you'd have a hard time believing what you see here on line versus the same folks interacting personally.

True some forums are hostile, like the HAMB. Most that I visit are very friendly. Some might have one guy that is always defensive, and argumentative. You know like they know it all. I value all the information I can get, then I evaluate it myself by searching the net. I've been a technician/mechanic for over 50 years, and there is always something new to learn, but don't need an attitude to learn it. There I'm done. Just my 2 cents, thanks for listening.

 

[Huskerman]

True some forums are hostile, like the HAMB. Most that I visit are very friendly. Some might have one guy that is always defensive, and argumentative. You know like they know it all. I value all the information I can get, then I evaluate it myself by searching the net. I've been a technician/mechanic for over 50 years, and there is always something new to learn, but don't need an attitude to learn it. There I'm done. Just my 2 cents, thanks for listening.

Yeah, what he said..................

 

[Hib Halverson]

Here is oil viscosity information for 82-12. The information comes from either the Service Manual for the model year in question or, in cases where the Service Manual refers to the Owner's Manual, the information comes from the Owner's Manual.

82--10W30, 10W40, 15W40, 20W40, 20W50, 30
(for extended operation in low ambient temperature 5W20, 5W30
84--10W30, 10W40, 15W40, 20W40, 20W50, 30
(for extended operation in low ambient temperature 5W30
85--(researching)
86--(researching)
87--(researching)
88--(researching)
89--5W30 recommended, 10W30 allowed if ambient temp is above 0°F, SAE30 allowed if ambient temp is above 40°F
90--5W30 recommended, 10W30 allowed if ambient temp is above 0°F, SAE30 allowed if ambient temp is above 40°F, LT5 only 10W30 required
91--5W30 recommended, 10W30 allowed if ambient temp is above 0°F, SAE30 allowed if ambient temp is above 40°F, LT5 only 10W30 required
92--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F, for LT5 only 10W30 recommended
93--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
94--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
95--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
96--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
97--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
98--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
99--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
00--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
01--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
02--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
03--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
04--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
05--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
06--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
07--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
08--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
09--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
10--(researching)
11--(researching)
12--(researching)

Important to note:

In 1992, GM4718M was not required for the LT5.

From 1997 to 2004, the only requirements are: an oil which meets GM4718M and that 20W50 not be used. 5w30 is only recommended and other viscosities between 5W30 an 20W50, while not recommended, are not prohibited.

From 2005-2009, the only requirements are: an oil which meets GM4718M and that 10W40 and 20W50 not be used. 5w30 is only recommended and viscosities between 5W30 and 10W40, while not recommended, are not prohibited.


This is a work in progress. I'll post more over the next few days

 

[hdkeno]

Here is oil viscosity information for 82-12. The information comes from either the Service Manual for the model year in question or, in cases where the Service Manual refers to the Owner's Manual, the information comes from the Owner's Manual.

82--10W30, 10W40, 15W40, 20W40, 20W50, 30
(for extended operation in low ambient temperature 5W20, 5W30
84--10W30, 10W40, 15W40, 20W40, 20W50, 30
(for extended operation in low ambient temperature 5W30
85--(researching)
86--(researching)
87--(researching)
88--(researching)
89--5W30 recommended, 10W30 allowed if ambient temp is above 0°F, SAE30 allowed if ambient temp is above 40°F
90--5W30 recommended, 10W30 allowed if ambient temp is above 0°F, SAE30 allowed if ambient temp is above 40°F, LT5 only 10W30 required
91--5W30 recommended, 10W30 allowed if ambient temp is above 0°F, SAE30 allowed if ambient temp is above 40°F, LT5 only 10W30 required
92--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F, for LT5 only 10W30 recommended
93--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
94--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
95--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
96--GM4718M required, 5W30 recommended, 10W30 allowed if ambient temp is above 0°F
97--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
98--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
99--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
00--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
01--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
02--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
03--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
04--GM4718M required, 5W30, 10W30, other viscosities not recommended, 20W50 not allowed
05--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
06--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
07--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
08--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
09--GM4718M required, 5W30 recommended, other viscosities not recommended, 10W40 or 20W50 not allowed
10--(researching)
11--(researching)
12--(researching)

Important to note:

In 1992, GM4718M was not required for the LT5.

From 1997 to 2004, the only requirements are: an oil which meets GM4718M and that 20W50 not be used. 5w30 is only recommended and other viscosities between 5W30 an 20W50, while not recommended, are not prohibited.

From 2005-2009, the only requirements are: an oil which meets GM4718M and that 10W40 and 20W50 not be used. 5w30 is only recommended and viscosities between 5W30 and 10W40, while not recommended, are not prohibited.


This is a work in progress. I'll post more over the next few days

Nice work Hib, as always, done in a informed, and professional manner.

 

[Strodder]

Thanks for the info, and your hard work posting this Hib.

 

[froggy47]

Best to use is Mobil 1 10W30. The upgrade from a 5W to a 10W will do much for the engine's durability and oil pressure in hot weather. Buy it by the case at Costco for a good price.

If you want to upgrade to a premium, ester-based synthetic, Red Line 10W30 is the way to go. You can extend the drain interval to 150% of oil life or 15,000 miles with Red Line.

If you trust the oil life monitor, I'd change the filter every 50% of life and the oil at 100%. If you prefer to go by mileage, I'd change it every 10,000 miles with a filter every 5,000. The best oil filters on the market right now are the Mobil 1 and the K&N.

Good complete info from Hib, the only things I would add (from personal experience) is the WIX/NAPA is also a great filter & stay away from the GM new "e" (for environmental) filter. I had one leak immediately when I put in on my LS6 and now several automotive techs (on other forums) are also reporting leaks with these.

I use Redline 10w-30 usually.

 

[Hib Halverson]

Good complete info from Hib, the only things I would add (from personal experience) is the WIX/NAPA is also a great filter & stay away from the GM new "e" (for environmental) filter. I had one leak immediately when I put in on my LS6 and now several automotive techs (on other forums) are also reporting leaks with these.

I guess I wasn't complete in my oil filter recommendation. Currently the Mobil 1 is my choice for oil filters. The K&N is just as good in that it's made by the same supplier and uses a similar architecture. The WIX is what I call "the best of the rest". It's not a premium filter as is the M1 and the K&N, but of the oil filters widely available, including mass marketers, it's clearly the leader.

What filters do I use? Well, back in the early 00's I invested a significant sum of money in to a number of cases of ACDelco Ultraguard filters. I'm still using that stock of filters for several of my cars. The two which I don't use UPFs for, I use the standard ACD filter (07 HHR with one of those new-style cartridge filters) and the Mobil 1 (95 ZR1 w. LT5 engine).

As for GM's new "e" filter? I agree. Corvetters are best served if they stay away from that product. There are a couple of web sites which test oil filters and I read on one that GM new filter design is not so good.

I use Redline 10w-30 usually.

So do I. RL 10W30 in everything except the Big-Block in my 71 and I use RL 10W40 in that.

 

[dougelam]

Hi Richard, Doug from next door here (Middleville). Welcome to CAC
Your post asked what oil to use next spring, you probably should have changed it before putting it in storage don't you think?
I use Mobile-1 10W30 with a Wix filter in all my vehicles and change it at 5K.
Seems soon but it is cheap insurance.:cool

 

[carlc1c3c5]

on my 00c5 i use MOBIL 1 5- 30 with fram,chg @ 5000mi when oil color changes. MOBIL 1 @ walmart cost 30.00 for 5 qt container.After reading hibs view I will chg to 10w-30 !! 89000 miles. Question my 07 montecarlo SS ls4 doesn t call for MOBIL 1, how come ??? I use MOBIL 1 anyway!!THANX PS if it ain t MADE IN AMERICA it ain t in my fleet!!!

 

[Richard Marvin]

Oil change

I would like to thank everyone on the oil change and Doug I just bought her mid Dec so I didn't have time for a change because of the snow. Once again Thanks: Dick (SMOKIN Z)

 

[Richard Marvin]

Oil change

I would like to thank everyone on the oil change and Doug I just bought her mid Dec so I didn't have time for a change because of the snow. Once again Thanks: Dick (SMOKIN Z)

 

[dougelam]

Question my 07 montecarlo SS ls4 doesn t call for MOBIL 1, how come ???

The General did not think it was cost effective, the cost of maintenance is a selling point to some regardless of what is better.

 

[killain]

boiling oils !

on my 00c5 i use MOBIL 1 5- 30 with fram,chg @ 5000mi when oil color changes. MOBIL 1 @ walmart cost 30.00 for 5 qt container.After reading hibs view I will chg to 10w-30 !! 89000 miles. Question my 07 montecarlo SS ls4 doesn t call for MOBIL 1, how come ??? I use MOBIL 1 anyway!!THANX PS if it ain t MADE IN AMERICA it ain t in my fleet!!!

It always seems to be a hot topic when it comes down to oil. I think HIb has presented very good information as always in his salty way. I have always used Mobil-1 5W/30 and a Mobil-1 filter on my 2003 LS1. Here in Pennsylvania we usually have a harsh winter but this year it's been mild. I could switch to 10W/30, I'm not sure if it would extend the engines life, but I'm no oil expert in any way of fashion. The owners manual in my 2003 says to use 5W/30 oil that meets GM4718M, so when I take it up for it's annual state inspection & oil change I take 7 quarts of the Mobil-1 5w/30 and a Mobil filter, I bought a case of them. I only change the oil once a year as I rarely drive more than 5000 miles per year. But I bought a 2007 Pontiac Grand Prix GT which has a 3800 series 3 V6 with a self-oiling Eaton M90 supercharger and it like the one CAC members Monte Carlo, it only specifies a conventional oil 5W/30. But I switched it over to Mobil-1 5W/30 oil in it as well and again with a Mobil-1 filter and change twice a year as I drive about 7000 miles a year. Even though the oil life monitor never get to the waring point. Perhaps I'm wasting the oil and filter, but when I was in the service the mechanics in my battalion always said an engine can never get clean enough oil & filters. But they mostly worked on the Diesel trucks and other construction equipment.

A lot of folks will argue that Amsoil is the only real synthetic Motor oil worth using, Why is I guess they buy into the MLM deal that Amsoil runs ? But I recently came across a list of the 'New' GM specified Dexos oils. And if you page down the two pages you'll see more oils I never even knew were made, but Mobil-1 5W/30 is a approved oil as is Quaker State and Pennzoil Platinum oils that I recognized. I'm not sure why General Motors company designed this list as a specific list of oils for their automobile line-up. But I guess I'd switch over to Mobil-1 10W/30 if I lived in Miami Beach, but here in Pennsylvania I think I'm better off with the mobil-1 as is. People get into some real heated debates over oil and I can't see why ? You never see folks arguing over coolant ? Most all new cars use DexCool and you swap it out every five years. But here at CAC you can get a little more factual information without the hype you find at a lot of other websites. Rob and the moderators do a great job.

 

[Hib Halverson]

Last week, on a trip to MI to interview various folks at GM Powertrain, I learned that Mobil 1 is no longer factory fill on all Corvettes.

LS3s without the dry sump, get an engine oil which meets the new Dexos specification but it's not a Mobil 1 branded product.

Only LS3 dry sump motors, LS7s and LS9s are factory filled with Mobil 1.

 

[froggy47]

Thanks for the post Hib. It'll probably only take a decade or two for all the Vette owners who have been bowing down to the holy oil M1, to realize that these original fill deals are FINANCIAL first and foremost, then maybe what's best for the engine. Not that it's a BAD oil (well the zddp content is way down) but there are other better oils.

 

[Hib Halverson]

I suppose GM's decision to use a Dexos spec oil in it's typical small-block V8 engines, including the LS3 wet sump engines, rather than a Mobil 1 branded product, is based in part on cost. But, it also may be based on the company's want to get more Dexos oils in the public's "eye".

The fact that Mobil 1–and all oil which meets GF4 or API Service SL/SM/SN–has somewhat less ZDDP is irrelevant to modern engines. Yes, it's an issue for pre-1987 Corvette engines with flat tappet camshafts or any engine with an aftermarket flat tappet cam, but there are a plethora of solutions to that, the least expensive of which are diesel engine oils such as Chevron Delo 400LE 10W30 and Shell Rotella T 10W30.

 

[timfitz63]

Looks like Mobil 1 has already been 'qualified' as a "dexos1" licensed oil... It would appear that GM could use it as a factory fill for LS3 'wet-sump' Corvettes...

If nearly every major synthetic oil brand on the market (including Mobil 1) already qualifies, what exactly does it prove to have the "dexos" license...? Sounds suspiciously like another "New GM" eco-marketing gimmick to me... ;squint: