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The upcoming Pathfinder will have a 4.0L V6 that will certainly overpower the Toyota engine.

Seems like a nice report. The only concern I may have is that the insolubles have doubled.

I sell new Infiniti cars for a living and we provide the first 2 years of service for free with car purchase. We use mainly 10W-30 Castrol oil in bulk.

Your post is a testament for how good Castrol GTX really is! I like it and have used it off and on along with Chevron Supreme and Havoline. IMHO, there's no dino that would have stood a chance in the situation you are describing!

I used 10W-30 Mobil1 in my 01 Trooper but for the last year I've been using 5W/10W-30 Chevron Supreme with great results and oil consumption of 1/4qt per 3kmi. These trucks drink oil but with regular maintenance will easily break 200k+ miles.

FYI, you may also look at the 10W-30 Chevron Delo 400 (not the same as Chevron Supreme). My local Sam's Club has plenty of both oils at very reasonable prices.

That 100ppm Cu/1000 miles must be UOA record! Hope the GC does better for you.

I also change the ATF annually. I just buy a case of Dexron III from Sam's and do several drain/refills. The last time I used Pennzoil ATF and it is performing very well.

Did you have air filtration problems while running the Pennzoil?

Glad to see more Trooper drivers onboard. I wouldn't worry about the oil consumption yet, it's normal for these engines. I used M1 10W-30 in my 2001 but for the last year I've been feeding it Chevron/Havoline 5W-30 or 10W-30 and oddly enough, the oil consumption has halved to about 1/2qt per...

Of course the inside looks great, but would you have expected anything less with 2000 mile OIC?

Perhaps you didn't own it long enough to notice a problem. OTOH, why bother with Amsoil if you don't keep your cars very long?

I would not experiment with M1 that early in the engine life. I've had 5 Nissans (2 trucks, 2 Maximas/Infiniti and a Sentra) and have noticed increased oil consumption if you switch to synthetic before 10k. If I were you, I would use a high quality 5W/10W-30 (Chevron Supreme, Pennzoil or GTX)...

I wouldn't call the lab results comparable, the Fe and Pb readings are way off. I would trust Blackstone personally but could the error have come from the way the samples were taken? If you took the Blackstone sample early in the oil drain and the OG sample when the oil was just trickling, it's...

What can an oil do if too much dirt gets through a bad filter? Even the best oil will show wear, right? I would change the air filter, then do one more run with GC and compare the results.

The absolute worst cars that I've changed filters on have been the two Hondas I owned (84 Prelude and 96 Civic) a few years ago. The filters were on the back of the engines and tilted in a way that assured a spillage of hot oil on you. In comparison, changing the oil on the 5 Nissans we've had...

Sorry, TOD is short for "torque on demand system" but that isn't important for this discussion.

FYI, I recently replaced the differential oil in both front and rear axles on my 01 Isuzu Trooper with LSD/TOD. I have previously used 80W-90 GL5 with LSD additive but this time I used Pennzoil 80W-90 GL5 with no LSD additive since the Pennzoil claims that "because of its unique formulation...

Those numbers look great, especially for an engine with that mileage! In fact, the wear numbers are very similar to that of my 01 Trooper with 34k. Good luck with the intake gasket fix, that seems to be a common problem for 98/99 models. FYI, you could easily check (and clean) the EGR yourself...

I am too lazy to count but I still have 50-60 qts of Havoline/Chevron 5W-30 and 10W-30 from Target's $0.68/qt sale.