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You will not really see much of an advantage or more protection running syn oil at 4,000 mile intervals

i would queation the need for synthetic especially with the recommended oil changes and the fuel dilution issues.

Delo ESI Is as good as most synthetics.

I don't think it matters.

Don't cut it too short.

The R.P. filters are pretty much the same element type as Amsoil and Donaldsons and Fleetguard. Those filters are state of the art for oil filters. The oil filters flow really doesn't matter in a passenger car motor. Oil filters are really unimportant just so there is one and it doesn't fail.

We deserve the government we reelect.

Usually with similar base stocks , a 5w-20 will be lighter cold than a 5w-40. What are you exactly looking for and why would the thinnest be important?

I doesn't matter.

Originally Posted By: Brenden This is a common practice with companies lately, they build up a long history of quality products like 50+ years, become a household name, then they start to produce sub par products while using there name and history to sell them for larger profits, basically what...

It doesn't take much these days.

Originally Posted By: Merkava_4 Steve S, You're mowing with my dream mower. I can't afford one, but I'm gonna at least try to get me a poster to put up in the garage. Too bad you live so far away I would let you use the mower to mow my lawns. 12 hrs round trip is a long way to drive to use...

Thankyou!!! 660 MAG for your help [ Merc marine motor if I do not mind asking?] The mower is way, way, way better. Almost cool "if a lawn mower can be cool"

GF5 oils seem super.

Most all oils today are fuel efficient so there will be minimal difference in like viscosities. drop the viscosity and maybe a .01 or so mpg at the best.

Why would you do a uoa on the inital fireup of an engine unless something bad is suspected?

Usually the big diesel engines are idled till the exhaust gas temps are at a safe level to shut down the engine so the oil doesn't coke in the turbo bearings.

Originally Posted By: artificialist Also, it depends on what diesel you have. Many European made diesels require a full synthetic. What are the oil change intervals in those engines?

My friend does his Ferrari that way and when we did the cam belts and valve adjust last year everything looked good. His engine doesn't get driven always but the oil gets hot when he does. Todays oils are good. you have to take the car out and run it more often.

is the pad loose in the caliper?