eastNC07vetteman
Member
I purchased a 2010 Grand Sport recently, it has 155 miles on it. I have noticed that while driving the oil pressure goes from 52 psi to 72 psi, and has topped at at 80 accelerating when cold, is this normal?
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I have run straight 50 weight Shell detergent oil for the last 25 years in my ‘big bore’ Continentals and always try and preheat the engine when the WX is cold
Betcha you're at 275°F in bearings. That's right at the limit of a petro-based oil's temp range.0– less than 30 degrees F. Some like the multi vis. stuff but I have avoided it opting for straight weight oil that resist thinning with high operating temps and I change it regularly. My oil pressure stays at 60+ psi during a climb in the hot summer months where the oil temps can reach upwards of 240 F.
A-1?BTW, 40 years ago I flew airplanes with big round piston engines at 3000+ HP for Uncle Sam. 50W detergent oil was all that was used.
Chevrolet introduced roller lifters on Corvette in 1986. Mobil 1 wasn't introduced until 1992. Roller rockers were not used until 1996 on a very few engines and 1997 across-the-board. Today, all Corvette engines have both.Most automobile engines run at a much lower power setting so I believe using multi weight and synthetic oil is all about better lubrication during cold starts and better lubrication of the very small bearings found in roller motor’s valve trains. The valve train pressures are said to be the highest found in these engines and when roller lifters and rockers started to appear Chev began requiring synthetic oils.
You might want to research that 200° rule-of-thumb a bit. With modern engines, I'd say one that runs sustained 200° oil temp would be an exception rather than a rule. Now, if the engine has an non-thermostatically-controlled oil cooler, I'd agree. Of the five vehicles I have in my project car fleet, the only two that run sustained oil temps during normal driving of about 200 are the two with coolers, my 71 BB Coupe and the 95. Everything else runs hotter. For instance, my 01 Camaro, is for the most part my daily driver. Once the oil temp stabilizes it sits 220-240.It has been my experience that rarely do auto engine oils get much above 200 degrees F in normal use. Here in the NW where the average temps vary between 40 and 70 degree F. 20W detergent oil changed regularly would probably work fine in these machines.
the 6 speed manual GS have the ZO-6 type dry sump system and the pressure will be different than the wet sump GSI purchased a 2010 Grand Sport recently, it has 155 miles on it. I have noticed that while driving the oil pressure goes from 52 psi to 72 psi, and has topped at at 80 accelerating when cold, is this normal?
air craft oil must be ashless. back in the day we used av oil in the race cars to prevent piston burningAeroShell 100W is what my Dad used in the Lycomings in the Aero Commander 680B we used to own, but that was ages ago. I can remember having to help him set-up space heaters under the engines before trying to start them on a trip to northeastern Montana we took one Christmas.
My Brother-in-law owns an aircraft service business in Nevada. I gotta ask him about synthetics in piston engines.
Betcha you're at 275°F in bearings. That's right at the limit of a petro-based oil's temp range.
What do you fly, now?
A-1?
Chevrolet introduced roller lifters on Corvette in 1986. Mobil 1 wasn't introduced until 1992. Roller rockers were not used until 1996 on a very few engines and 1997 across-the-board. Today, all Corvette engines have both.
There reason GM went to Mobil 1 in 1992 was the LT1's 300-hp SAE net and higher oil temperature, not roller lifters.
You might want to research that 200° rule-of-thumb a bit. With modern engines, I'd say one that runs sustained 200° oil temp would be an exception rather than a rule. Now, if the engine has an non-thermostatically-controlled oil cooler, I'd agree. Of the five vehicles I have in my project car fleet, the only two that run sustained oil temps during normal driving of about 200 are the two with coolers, my 71 BB Coupe and the 95. Everything else runs hotter. For instance, my 01 Camaro, is for the most part my daily driver. Once the oil temp stabilizes it sits 220-240.
I have 85 miles on my 2010 grand sport convertible. I had it for almost a year. It still smells new inside. Do I change the oil once a year reguardless of the miles, wait till I have X number of miles, what do you think. I am going to use red line oil. Also do I use the racing oil or what do think, of course using the 5w-30. Thanks• GM4718M
Your vehicle's engine requires a special oil meeting GM Standard GM4718M. Oils meeting this standard may be identified as synthetic. However, not all synthetic oils will meet this GM standard. Use only an oil that meets GM Standard GM4718M.
Notice: Using oils that do not have the GM4718M Standard designation, can cause engine damage not covered by the vehicle warranty.
• SAE 5W-30
SAE 5W-30 is best for the vehicle. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 20W-50.
How often do I change the oil / filter? Once a year for oil & filter, or oil then oil & filter, or mileage if so how many miles? Me I think I going to change & filter next winter. (winter 2012)If you've had the car a year and it only has 85 miles on it, clearly, you seldom drive it. I'll go out on a limb and guess that when you do drive it, you don't run the car too hard.
If Red Line is your choice, use 10W30 Engine Oil. Do not use Red Line Race Oil.