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I've searched and could not find an answer, so I thought I'd ask here due to the knowledge available. I've had a few dmaxs and they always have had very low iron numbers on UOA. Recently I had to repair a lower oil pan and was surprised to find a large round magnet inside. It had a little metal...

I need to find a good oil for my 12v cummins. It’s fully built, 16:1 compression, roughly 65psi boost, 140# over stock valve springs with hardened pushrods. Originally built for a drag truck, now it’s in what I want to be a daily driver and tow vehicle. Turned the power down to about 550-600, so...

I'm very happy overall with this UOA. I don't typically use oil stabilizer, but in west Texas heat and idling 10+ hrs a day I wanted to make sure the oil didn't get too thin when hot. The oil had 6,300 miles and almost 500hrs on it, Rotella T4 CK-4 with 1qr Shell X100 oil stabililizer.

It's been years since I've looked for the info and can't find it now, but there was a filter, I think a CAT filter, that screwed right on and filtered better than the stock replacement option. Does anyone have info on this? I'm not looking for big dual aftermarket kits, just a better...

I'm sure this will bring all sorts of opinions but I'd like some thoughts on this. I have a couple old first gen Dodges with the 12v, one is stock but turned up a little and the other is built and runs @75psi boost and 4,200rpm. It has 140lb valve springs so it's under much higher strain than...

I have a Honda 3000 invertor gen and want it to last as long as possible. It's normal use is to run a 33' travel trailer over a weekend, and power the basics in the house during power outages. Currently I have about 500hrs on it and change the oil @75hrs. I was using the recommended Honda oil...

I've been surfing this site for over 10yrs but finally joined to as some questions. I have a Passat TDI and looking for alternatives to the special oil they recommend. The last two oil changes I've used Rotella T5 and seems to run fine. I went the first 50k miles by the book, but now I don't...