slick 50?

[XS650]

The only place I have seen near 100,000 mile oil change interval claims for Mobil products has been for long haul highway trucks.

http://tinyurl.com/uvwv
or, in case the tiny URL expires.
http://www.prod.mobil.com/cgi-bin/b...ts_services/delvac1/testimonials_content.html

more

http://tinyurl.com/uvzf
or
http://www.highwaystarmagazine.com/yourjobfeature.cfm?ID=146

What does this have to do with Corvettes ? Not much.

But notice that when you run down an extra long oil change interval story to a reliable source, it almost always involves long haul trucks that get their miles put on rapidly and are kept running most of the time.

If you were going top run your Corvette 100,000 miles in a year and keep on top of monitering the oil condition, you might be able to get 20,000 to a lot more miles out of a good synthetic.

If you are like most of us and your car spends a lot of time parked and get's cooled off many times every 100 miles then you are being harder on your oil than someone who never lets their engine cool off.

 

[AnytownUSA]

Check out this link:
http://neptune.spacebears.com/cars/legal/s50com.html

The FTC considers Slick 50 to be snake oil and ordered them to stop advertising that it in any way helped with engine wear or performance.

Also, Paradise Garage (the host of the slick 50 article) is in the process of testing various synthetic oils, they have already covered Mobil 1 and have published their results. It’s pretty interesting, under Synthetic Oil Test or something like that on their homepage.

 

[GreggPenn]

I only have to change oil twice/yr to cover the 6K miles I drive. To "chince out" and not put $10 worth of new oil in twice/year is pretty damn cheap! If you can afford to put $30 tanks of gas in a car that has trouble making 20miles/gal around town, then you can afford to change the oil every 3K.

If you drive a lot more than 6K/yr then synthetic and longer intervals may make more sense than getting your oil changed every couple of months. Also, synthetic is not listed as the recommended oil back in '89. I assume that tolerances must not have been as tight back then. Also, I have to wonder if '89 engine seal materials can be compromised by synthetics -- since synthetics weren't part of the design plan. (In fact, I've heard people say NOT to use synthetic in an older car like mine. Seal problems and oil consumption were sited as the main risks of converting to synthetic).

gp

 

[XS650]

(In fact, I've heard people say NOT to use synthetic in an older car like mine. Seal problems and oil consumption were sited as the main risks of converting to synthetic).

gp [/B]

There is -some- risk that the different oil additives and in some cases radically different base stock in some synthetics will cause leaks in an older car that was run on dino squeezing for years. There is no reason to not use it in an older car with a fresh engine.

 

[Sweet66]

oil and chevrolet engines..

the ever ongoing talk about additives . synthetic oil etc.. from my reading and experience . Slick 50 is likely not worth the expense..
you can get 90% of the extra lubricating qualities of synthetic oil by using semi synthetic oil.. which is a lot less expensive.than pure synthetic oil. change your oil every 5000 miles and at least yearly use a top quality filter { Fram } Chev's run well on 10-30 .. if you don't want to pay for a semi synthetic .. use a high detergent oil.not the lesser quality stuff from Shell or Esso. GM sells EOS [Engine Oil Supplement] for $5 or so.. my 91 Caddy on start up rattles less with it in the oil so it is doing something.. the best engine treatment i have seen and used is a product called[ in Canada] Envirosave a one time friction reduction additive with testimonials from dozens of users..used to be called Microlon ..
it is worth the $150 for sure. i used it in a 350 Chev wagon which ran out to 400,000 k before the body was rusted out and then got sideswiped.. the engine and transmission had both been treated
I gave the car to a friend who has the engine/trans sitting in storage while the rest of the car went to the crusher.. The valve guides need replacing but i bet the motor still has another 100,000 k left in it.. before it would need a complete re-do. Chev engines are remarkable pieces of engineering and will takea lot of abuse .. since any c-2 owner has alot of $/energy tied up in his piece of fiberglass .. spending some $ on oil and oil changes is the cheapest part of the maintenance plan..