Originally Posted By: Linctex
Originally Posted By: terminaldegree
Switching is also fine, but I’d rather save my money on a motor with that many hours to pay for refreshing exhaust riser gaskets, water pump impellers, stern drive gaskets, and other things that are more likely to ruin your day than the brand of motor oil.
Agreed.
It's probably time to do a THOROUGH inspection of the entire drive system.
If he's gone 1000 hours without doing that at least once a year, he's probably already on the cusp of apocalypse.
Unless you have a catalyzed 5.7 (doubt it), your engine isn't going to care that SM was dropped from the bottle.
Where the engine is concerned, skip the top-end job. A brand new crate engine + brass freeze plugs is less than $2000. When that top-end is done, kick the whole engine, rather than tighten the top, just to start having bottom issues.
When dealing with big blocks at $5,000+ for a crate, we bother with the top end (especially since big blocks love to get a hole ate through their heads). On a 5.7? We'll do it if someone is adamant, but pretty much nobody ever has been.
Amsoil in that engine? See above. Every oil change, throw your savings by using T5 into a jar marked "crate engine". Might be surprised how much of the job your jar will cover when the time comes.
Use some nice RA or WM dollar clearance filters, and jar that savings too.