98 Suzuki Swift, M1 EP 5w-30 @ 15K

[BlazerLT]

quote:

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Originally posted by buster:
In this case, I would have stuck with the Amsoil with the lower Fe numbers, however, the EP did fine and I highly doubt you'll ever notice the difference over the engine's life span. Amsoil ASL is competively priced against M1 EP.

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He also had 5000 less miles on the Amsoil and remember Mobil1 has some iron right out of the bottle.

 

[427Z06]

Looks like the M1 EP did better than the GC and almost as well the Amsoil as far as the Fe is concerned. However, the concern with the Fe is laughable, since there's at least 5 times as much wear surface area of Fe than there is of Cu. And with zero evidence whether the Fe is from wear or loss due to chemical reaction, that type of hawking is best left to carnival barkers.

 

[gudmund]

138,000 miles and still running fine with M1!!!!

 

[oilyriser]

How's cleanliness - can you see any staining on the metal parts when you open the oil fill cap?
I wonder if topping off with 5w20 would preserve the gas mileage.

 

[gudmund]

under the valve cover is CLEAN! looks GREAT!! will be rol1ing 139,000 miles tomarrow on the way to work.