RichP
NAXJA Forum User
- Location
- Effort, Pa
I pickup the Mobil-1 'high mileage' oil at Walmart, they have 5 quarters on sale for $22 here. Bought a half dozen on saturday, will pickup more this week.
I am still finding API SL oil, lately been using Autozone brand API SL, 20W50 in 2 vehicles and 15W40 in the low mileage Jeep. Have not been able to find the older API CH diesel oil lately, still looking for a source to restock for my diesel.
Any oil for those who are looking:
John Deere Plus-50
Comes in 0w-40 and 15w-40. 0w-40 is synthetic, 15w-40 isn't. Both are rated at SL. 0w-40 is rated as CH-4 for diesel, the 15w-40 is rated at CI-4 Plus.
Here is the 15w-40 dino info
http://www.deere.com/en_US/parts/partsinfo/oils_and_lubricants/oil_plus50_15w40.html
Time to revive this old thread. I am doing up date research tonight. I have been using Autozone 20W-50 in my gas jeep and 2001 saturn engine the last 2 years because they have an API SL (Not SM) formula on the shelf here in houston.
But I am running out of oil for my old diesel engine jeep. Mobil Delvac 1300 super 15W-40 is on sale here, O'reilys, for $9.99/gallon so I was digging for zinc phosphate concentration data on it, as it is API CJ-4/SM, which I suspect has too little zinc, ZDDP. I found a nice mobil chart, dated this month that lists all their oils and the zddp content of them!
http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf
Am I wrong in thinking that too much P&Z can kill CATS, and too little P&Z can damage tappet surfaces?
That is correct on both items.
I have also read that too much 'moly' is corrosive, abrasive, and deposits too much residue on O2 sensor, and into CAT, thusly messing up performance, creating code nightmares. Oils with SM have moly in them. Since I am running RENIX, I do not have it's proper reader, etc., etc., etc.
Some of them Moly, some have calcium, some boron, some have mixes of the 3.
Bottom line again: What do you recommend for those of us with these RENIX 4.0's to use. Seems I have so far leaned towards non-synthetic Mobile 1 High Mileage oils, (on my next purchase.., lol, if still available), since I do not like promoting 'leaks' with synthetics. What say 'ye?
I am using Autozone API SL grade, 20W50 on my 4.0's (140,000 and 287,000 miles), here in hot humid Houston, where it rarely gets below 32 F. I am also using it on a 2001 Saturn with over 200,000 miles. It does not show API SM on the label, it is the older spec, and is and has been available the last 2 years, private label Autozone (probably made by Warren Petroleum).
I do not have any new, tight engines, or cold climate issues to deal with, so those with newer engines and cold weather need to make other choices!!!!
I am up in the air about; CH-4, CI-4, API: SE, SG, SL grades in 5W-20, 10W-30, (If'in I've got my facts straight, lol.., feel like I belong in the funny farm).
The CH, CI grades are diesel oil specs.
After reading those first 15 pages, I saw no real recommendation as to what we 4.0 XJ'ers should use.., just a long investigative debate.eace:
How long did cats last with the higher ZDDP oil? Quite a while. Yes, ZDDP can contribute to O2 sensor and cat death, but its not as bad as some people make it out to be. Also, too much ZDDP can be harmful to engine components. You want to shoot for around 1200-1300 PPM ZDDP.
Valvoline ZR-1 10w30 (silver bottle) is good for a stock 4.0L engine, however there has been some discussion that its ZDDP levels have been reduced.
As far as Amsoil ZDDP levels see here: http://www.amsoil.com/techservicesbulletin/motoroil/tsb mo-2007-08-08 flat tappet.pdf
great chart but according to it all oils listted are full sythetic which i'm sure the majority of us with our notoriously leaky 4.0's don't use.