I didn't notice this. I'll have to check my stash of t6 and see. Just looked at Amazon pics (potentially unreliable) and it looks like only the 5w30 T6 has an SN rating. 15w40 and 5w40 do not.
New engine Jeep 4.0L - which oil?
- Thread starter moosemeadows
- Start date
To my knowledge, that is correct. I used to use the 5w40 in my motorcycle and 4 wheelers, but no longer due to the lack of spark rating. Older stuff did, new stuff does not have the rating on the bottle, and that is what i go by.
Same. The Jeeps and the motorcycles all got T6. I haven't bought T6 in a few years. I wonder when it changed.
Not sure exactly, but within the last few recent years.
Ok me being dumb What's spark rated and what effect does that have in oil?
Spark rated just means rated for gasoline engines which have spark plugs. (Diesels don't have spark plugs). If a diesel oil does not have gasoline certifications on the label, the additive pack may have too much zinc and phosphorous to meet the gasoline oil specifications.
Would this just be a concern for the emissions equipment/catalytic converter?
Thanks ripcord. I see you reside in PNW. Wish I was back up there sure miss it. Maybe someday.
Pretty much.
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Simple, Castrol GTX 10W30. I guess you could call it a synthetic blend. It's the builder's recommended grade and it's not the dreaded
(for you) PZ. Good luck with that new engine.
(for you) PZ. Good luck with that new engine.
Thank you for the advice and well wishes
My daily is a 2000 xj. It has had 5w-30 for all of it's 185K miles. Switched to synthetic around 50k, I use SuperTech. If I add a half qt of oil in between my 5,000 mile oil changes, that's a lot.
These engines are pretty happy with any oil you put into them.
These engines are pretty happy with any oil you put into them.
The 02 TJ I bought new and still my daily driver currently has 203k on it. It gets whatever 5w30,10w30,10w40,15w40 or SAE 30 is in the clearance section.
