The Critic
Thread starter
Originally Posted By: fdcg27
I dunno, maybe?
Another possibility is that the thicker oil brought lower consumption, which in turn allowed more timing advance, and thus lower fuel consumption.
A third possibility is that M1 15W-50 contains a significant ester component (Mobil isn't telling) which would provide reduced friction.
Also, esters may (I wrote may) degrade fuel octane less, thereby allowing more timing advance.
Anyway, the old thing did very well on M1 15W-50, while fuel consumption was no lower in the first 4K run of Maxlife 10W-40, and the oil leaks, absent with the M1 15W-50, have returned.
Can't I use 20-50 in my climate? It rarely falls below 45 here.
I dunno, maybe?
Another possibility is that the thicker oil brought lower consumption, which in turn allowed more timing advance, and thus lower fuel consumption.
A third possibility is that M1 15W-50 contains a significant ester component (Mobil isn't telling) which would provide reduced friction.
Also, esters may (I wrote may) degrade fuel octane less, thereby allowing more timing advance.
Anyway, the old thing did very well on M1 15W-50, while fuel consumption was no lower in the first 4K run of Maxlife 10W-40, and the oil leaks, absent with the M1 15W-50, have returned.
Can't I use 20-50 in my climate? It rarely falls below 45 here.
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