Quote:
Originally Posted by 500hpgtx
With advancement of synthetic oils today, I think I may extend the life of the main bearings by using 3 quarts of 20-50 synthetic or blend plus 2 quarts of lucas synthetic oil stabilizer.
With cold oil pressure around 50-60psi, it is amazing how quiet it is. I am obviously looking to kee p the pressure around 40 psi when hot. With a worn 3800, I think the engine can only benefit from the added viscosity. Since I am not revving the engine on a regular basis, I think the oil flow restrictions from the increased viscosity should not be a problem...Reminds me of the 70's using Motor Honey..cheers
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If I am correctly informed, it's not a good idea to start using full synthetic motor oil in an old engine.
The Pontiac uses half-synthetic motor oil and because the engine has been using this type of motor oil for a long time the "cure" may cause all kinds of new trouble.
Full synthetic oil is supposed to keep the engine cleaner and may also clean old "dirt" inside, causing blocking of oil channels and other issues.
Only after a full engine overhaul (meaning a totally cleaned engine) you can start using full synthetic oil.
We've experimented with a 32 year overhauled engine (alike the Pontiac injection system, not carburetted) and this car and engine still runs fine.
Using an oil conditioner is not one of my favorites for the same reason as starting using full synthetic oil to replace other oil types.
My 2 cents.