GOTWAX

Bought a 99xj 2 weeks ago, finally getting the chance to flush and change the oil, what would be the best recommended oil to use. 4.0 with 225K miles.

98_XJ Sport

I as well as a lot of people use Shell Rotella. With a Mopar, Wix or Napa Gold filter. It's really up to preference, just don't use a Fram filter

Xj88

I just use mobil 1 full synthetic and a wix filter.

GOTWAX

Any feedback on the K&n filters? And what weight oil?

djb383

K&N is a good filter....but then there are plenty of readily available good filters that don't have a $6 bolt head on them.

GOTWAX

Ok, I've seen them just never used out heard any reviews about them, I'll go with wix. I'm horrible at choosing oil weight though what would be best?

98_XJ Sport

Whats your temp range? Cold or hot normally?

GOTWAX

It runs right at 210 pretty constant

belvedere

Since you're in TX, and have alot of miles on your engine, 10W40 may be appropriate. I'm also a fan of Wix/NAPA Gold.

iluvmud

this but i use a mobil 1 filter as well.

djb383

Read this.......by Sunday night, u will become a motor oil expert.

http://www.supramania.com/aehaas/

tjwalker

The viscosity you use depends on the climate you are in. A person in Hawaii is not going to use the same viscosity as somebody in Alaska in the winter.....

From the manual:

If the outside temperature is primarily above 60 degrees farenheit, use 10-30

If the outside temperature is primarily below 60 degrees farenheit, use 5-30

I see no reason to not follow the engineer's recommendations here.

djb383

Times change.....can u even buy "SJ" rated oil anymore?

mr white

I run 0w-30 with a mopar filter.

salad

atta boy

+1 read the link from djb383