Re: Oil change better every 10k miles with full synthetic, or 3k with conventional?
Quote:
Originally Posted by
addzradd
Cheapest stuff I can find in the GTP, usually wallyworld supertech special. I run it at 5-6k intervals and blackstone says I could probably extend it out to 7500 if I wanted.
I never understood the bible 3k mile oil change thing, that was standard for high tolerance clunky 60's cars with alot less sophisticated oil than we have today, of course it will last longer. FWIW my cylinders sitll have crosshatching on them and my valve covers have a some light brown staining, mostly from seepage I would imagine.
The modern engine is now very complicated, likely turbocharged, abused then shut off immediately, small oil passages and designs prone to carbon buildup.
In GM pushrod land, it doesn't matter.
If your engine is more complicated, it sure as hell does. See the GM 3.6 timing chain issues. Canyon five cylinders suck too. Also the VW, Volvo, Saab oil issues around the early/mid 2000's.
Re: Oil change better every 10k miles with full synthetic, or 3k with conventional?
I usually put in either partial or full synthetics in my vehicles, and the past three vehicles have had some kind of Oil Life gauge. I put 130k miles on my Grand Prix, and never had engine trouble. It was just everything else. Impala I've put about 70k miles in 6 years. The only major problem I had was shortly after buying it the brake computer had to be replaced. No engine trouble. My Mercury Mariner Hybrid is about to hit 100k miles, and the engine it is fine. Of course the engine doesn't have 100k miles, but I assume as long as I keep up with the oil changes at the proper times, I should be able to drive it another 100k. I hope it will be the battery giving out at 200k before anything else.
