Before I get trampled by Recco's for other brands of synthetics that may or may not be better (I don't want to debate that), I want to stay with Mobil 1 because it's more readily available locally...
My '02 Jeep Wrangler has a 4.0 engine and 3 speed RH32 transmission. This combine with 4.56 gears and 35" tires generates 3k RPM at ~ 68 mph. Highway use is infrequent at best, but they are hard miles. This Jeep is also taken offroad a couple weekends a month where long periods of 1500 rpm or less under load occur. Since the ODO had 1k on the clock (36,700 now), this Jeep has seen 3k OCIs with a larger M1-301 filter and M1 10w-30 fluid. I use Napa air filters and change as required.
I really want to bump up my OCIs to 8k or more for $ and waste reasons.
at 8k OCI, that would have been 4x$35 = $140
that's significant IMO..>
So which would you go with? M1-301 (or whatever the new 'EP' equivalent is) + 10W-30, 10W-30EP or Delvac 1 15W-40 If there are any other M1 options for me, please throw em out.
TIA,
Matt
*couple pics to show RPMs and just because*
My '02 Jeep Wrangler has a 4.0 engine and 3 speed RH32 transmission. This combine with 4.56 gears and 35" tires generates 3k RPM at ~ 68 mph. Highway use is infrequent at best, but they are hard miles. This Jeep is also taken offroad a couple weekends a month where long periods of 1500 rpm or less under load occur. Since the ODO had 1k on the clock (36,700 now), this Jeep has seen 3k OCIs with a larger M1-301 filter and M1 10w-30 fluid. I use Napa air filters and change as required.
I really want to bump up my OCIs to 8k or more for $ and waste reasons.
at 8k OCI, that would have been 4x$35 = $140
that's significant IMO..>
So which would you go with? M1-301 (or whatever the new 'EP' equivalent is) + 10W-30, 10W-30EP or Delvac 1 15W-40 If there are any other M1 options for me, please throw em out.
TIA,
Matt
*couple pics to show RPMs and just because*

