Just thought I would see what most of my fellow Jeepers are using in their jeep
Engine: 2.5L 4 cyl
Oil: M1 T&SUV 5w40
OCI:6 months or 8k
Oil Filter: Oversized Pure 1, Napa gold, or Super Tech
I lived in Lindenhurst IL (west of Waukegan) when I had my bought new 95 JGC 4.0. I ran Mobil 1 10w30 for the 176,000 miles I owned it and my son-in-law now has 198,000 on it. Fram oil filter. Never a valve cover off or any problems except rear main seal replaces at 102,000 miles. With the new 5w40? SUV/truck oil out I'd probably use that.
Location: Sturbridge, Ma
Year: 1992 (mostly)
Model: Wrangler YJ
Engine: 2.5L 4 cyl 150cid
Trans: Muncie SM420 w/7.05:1 first gear
TCase: NP231HD 1/2ton Dodge by JB Conversions
Axles: lockers front/rear
Tires: 35" Mickey Thompson Baja Claws
Miles: 38,000 on motor out of '95 YJ
Oil: Castrol GTX 5W30 winter, Chevron Delo SAE30 and Delo 15W40 (the Delo 15W40 kicks butt). I also like SuperTech oils (XOM up here).
OCI: It depends on how much I wheel. 90% trail rig/10% street. With my new Delo stash, probably 3-4K+ miles The Delo really IS that good.
Oil Filter: Motorcraft FL300, SuperTech ST43(non-ecore stash), or Purolator 14670
Location:Windsor,Ontario (sin city north)
Years:1999 XJ & 2001 TJ
115,000 miles on XJ...62,000 miles on TJ
Oil:0W-40 Esso XD-3 Extra every 4 months or roughly 8,000km(5,000 miles)OCI
Napa Gold 1515 oversize or Baldwin B2
2001 XJ 81k miles
4.0, AW4, D30, 8.25, 231 soon to be a 242, now featuring Teraflex rear discs :-), currently wearing 4 studded snows, BFG TA KOs during summer.
I have used GC, AFL, ATM, T&SUV, and Pennsoil in the past. 12.5k miles on the T&SUV with a long commute. I recently got a job 1.5 miles from home, and I'm actually going to be moving closer this summer, I still don't know what I'll do. Probably RTS at 3k OCIs year round. GC is in it currently with a purolator Pure-One filter.
Model: Cherokee Sport
Oil: Amsoil 10W40
OCI: 10K/1 year
Oil Filter: Amsoil SDF 15 every 5K/6 months
I have an oil change coming up and I'll be trying one of the new EAO filters without the filter change halfway through the OCI.