1380KPOI
Well-Known Member
- Joined
- Nov 14, 2016
- Threads
- 4
- Messages
- 95
- Reaction score
- 16
- Location
- Orange County, CA
- First Name
- Poi Boy
- Vehicle(s)
- 2017 GT Premium
How did you like using QSUD 0W20? I enjoy reading over 540 RAT's blog. I sent him a new bottle of Motorcraft 5W20 synthetic blend which is what our vehicles come with from the factory. I was shocked with how much lower the PSI sheer value was compared with other oils he tested. I switched over to QSUD 5W20 for my application along with a Filtermag and a cheap donut ring magnet from Harbor Freight LOLChiming in relatively late on this thread. Based upon 540 Rat's blog, I'm going to change out to 0W-20 Quaker State Ultimate Durability--the highest film-strength 0W-20 of any oil he's tested, and the oil he personally uses. I can't find it at Wally World, and it's $8/quart at AutoZone, but given that this is the best car I've ever owned, I'll spend it for the cold-start wear protection. First change will be at 1000 miles.
Upthread, a commenter made a good point about a magnetic drain plug masking any Fe wear particle measurements from UOA (though the tradeoff is that it pulls those wear particles out of suspension so that they don't keep cycling through bearings). I have a spiffy blue magnetic plug on order, though now I might not bother to install it.
There's an interesting post on BITOG (also posted upthread) that points out that, per 1000 miles, the Fe particle accretion rate is *lower* for an extended drain interval than it is for a short interval, at least as far out as 10,000 miles. TBN and TAN become the limiting factors for condemning the oil at that point.
https://bobistheoilguy.com/used-oil-analysis-how-to-decide-what-is-normal/
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