Originally Posted By: 901Memphis
... Mobil 1 is a cheap choice at under $22 a jug, so i would probably go with that...
Sorry, not for the Jeep 4.0 engine.
Originally Posted By: Kuato, from this thread
M1 is a great oil; but for your Jeep, I can say that M1 has historically shown higher amounts of Fe(Iron) in samples, up to 4x the level of what other oils tested. Some will pooh pooh that statement, but the results have shown over and over that the 4.0 doesn't like M1.
I believe OP has also already stated he intends to not use M1 in his 4.0.
... Mobil 1 is a cheap choice at under $22 a jug, so i would probably go with that...
Sorry, not for the Jeep 4.0 engine.
Originally Posted By: Kuato, from this thread
M1 is a great oil; but for your Jeep, I can say that M1 has historically shown higher amounts of Fe(Iron) in samples, up to 4x the level of what other oils tested. Some will pooh pooh that statement, but the results have shown over and over that the 4.0 doesn't like M1.
I believe OP has also already stated he intends to not use M1 in his 4.0.
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