Question for you four stroke guys

[wpearch]

the reason the the OEM don't like synthetic oil is it works to well a new or rebuilt engine needs to wear in
at first synthetic won't let it

[cterrebonne]

Originally Posted by wpearch

the reason the the OEM don't like synthetic oil is it works to well a new or rebuilt engine needs to wear in
at first synthetic won't let it

on some engines....as others dont. amg, srt, svo and the other factory performance subsidiaries all ship their engines with full syn and most use mobil 1. jag recomends castrol probablt because its a BP company but that is another topic. by todays engineering and machining standards of you can't cut a bore precise enough not to need to worry about break in, then you shouldnt make engines.

[randlemanboater]

My Johnzuki specified synthetic blend.

[wpearch]

that what a service manager for a boat dealer up here said at a meeting I was at










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[THEFERMANATOR]

Another kicker to synthetic oils is putting them into engines with seals that have lived there life with dino oil, they tend to leak oil after the switch. The synthetics are slicker than dino and will slide past older seals. Went through this one before with my COMANCHE. It didn't leak anywhere, I switch to CASTROL SYNTEC for extended service intervals and it looked like an oil shower afterwards. Switched back and the leaks stopped shortly there after.

[spareparts]

i run rotella in every thing I own

[THEFERMANATOR]

Originally Posted by spareparts

i run rotella in every thing I own

15/40 is a bit thick for alot of applications. My 4.0 has a hard time turning over on a cool morning with 10/30 in it. To bad they dropped the 10/30 ROTELLA, that was some good stuff.

[spareparts]

still find the 10-30 Rotella around here, and whos kiding who, you live in Fl, it never gets cool down there. haven't had any problems start on cool mornings with my Cherokee( gets just below freezing during the winter, but not for long). I'll tell you what I do have a problem with, when I start the Cherokee, it doesn't start right off like a fuel injected motor should, it has to spin over a few times before it lights off, I haven't even checked anything yet, any ideas?