iannis

Which engine oil do you use for your JK?

I am between the following two:

1- Mobil 1 5W20
2- Mobil 1 5W20 Extended Performance

Lorrel

I see no reason for using extended for me. I change the oil and filter using Mobil1 5/20 and a Mobil1 filter every 3K.

iannis

For the first change should one use synthetic or ordinary?

VA_Rubi-Red

My understanding from other threads in this forum is that the JKs come from the factory with synthetic. Tolerances are close enough these days that synthetic should be fine (and perhaps better).

racer83l

i use castrol GTX 5W- 20 I change it every 3,000 miles, if its good enough to keep my warranty intact its good enough for me.

Im not going to spend more money than I have to.. But I am also sticking to the severe service maintenance procedures.

In my old 2005 Acura I changed my oil every 10,000 miles (3 months).
but my warranty was only to 50K miles which I hit just after 1 year.

SASQUATCH

same here and we could actually go every 6k if we wanted with M1.

Black08X

JK's do not come from the factory with synthetic. It's good ole fashion dead dinosaurs.

HappyCurmudgeon

Wesson.







I change my oil frequently, so i get Zero benefit from extended anything. Regular old dino turd 5W-20 and change at 3000 miles has never let me down on any vehicle in way to many years to yap about.

If your boat gets floated by synthetics, I am sure those work fine too.

RedneckJeep

Unless yall are just beatin the holy SNOT outta these things, 3000 miles is just a waste.

pearl-drum-man

Probably true, but for the cost I'm fine erring on the side of caution, of course I don't let a few hundred miles over concern me either.