Synthetic oil vs conventional oil

[twinwinds]

Thanks for all the info guys......thinking synthetic.

Cheers

[Sea Ranger]

This has nothing to do with an outboard motor but I use to own a small 18 hp air cooled engine and was told to not use synthetic oil in it because synthetic oil when used in an air cooled motor will cause less friction but in doing so you loose a bond between the metals that is needed to transfer the heat better.
I also use to own a Chevy Astro work truck that was always loaded to the max and drove it like that for over a year , then decided to try a synthetic oil in it and after about a week or 2 of driving I noticed about a 10% increase in power, Gas wise I never really noticed much of a difference but that might be because I used a lot of gas anyways. Steve.

[The Fish Assassin]

quote:You should sell off all your used oil to a certain "Steve" individual Jack! aka Captain Anal?

I'll take it.. It'll work fine as bar oil!

Take only what you need.

[claymcpher]

Follow the owners manual and use what it says to or even close to it, some even say it right on the engine oil cap, weather syn or real oil using different oils and additives can void the warranty, personally I would not use 20w50 unless it pushed the blues, both my vehicle recommend 5w30 so that's what they get

[JDR]

Synthetic oil stays on the parts longer less friction but also has a tendency to get past weak or dry oil seals more so than conventional oil. As for warranty if the manual says yes and engine is new go for it. Some engines don't break in on synthectic, too slippery. also it tends to disperse the dirt better(stays cleaner and doesn't break down as fast)