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Oil is oil.

I'm in the 85W140 camp on this one. A cheap fix if it works.

2013 GMC 1500 SLT 325,000 kms plus 3% for 275/70R18 tires. F&R Diff; out 75w90 Pet Can in @ 103K kms Sept 2017 In; 80W140 Pet-Can T-Case, out; PC Dura-Drive ATF, in @ 134K Aug 2018 In Shell THF Spirax, meets JD J20C. We'll see how THF works in T-cases.

www.btarcm.com

And Alaska will throw in Sarah Palin.

Blame our open western border policy that is allowing Pilipinos to take over Tim Hortons.

Yes. To stop Russia from taking Alaska back. BTW, most of our USA built M777s (3 axes) are lent out. Time to order 30 more at $1M each.

Oil is oil.

Yep, and the primary function of engine oil is to make money for the blender and downstream marketing. Manufacture the product as cheaply as possible and sell it for as much money as possible through hype and advertising. Lie if you have to.

2011 GMC LML Duramax 228,600 kms out 5W40 Duron Fram ultra in 10w40 Duron & Hastings filter 2013 GMC 1500 5.3L 234,000 kms out 5w40 Walmart Euro & Fram ultra In Duron 10w40 & Castrol branded filter #CAS 10576 Both vehicles had 9% OLM remaining.

They cost about the same as a one ton Diesel pickup.

Engine oils are always thicker at 100C, or any other temperature than required to prevent the engine from squeaking to a stop if the oil was thinner than required.

That's why I avoid thinner than XW30s and suffer the 1% potential loss in fuel economy. I'll read where taxi and trucking companies saved $X in extended oil change intervals and/or fuel economy savings. OK, show me the money. I didn't think so.

I believe that engine oils are blended to a performance level cheaply as possible, then marketed and hyped as budgets allow. Most do it yourselfers, (we're talking engine oil here), buy an oil that meets manufactures' warranty requirement, and usually the one on sale. That puts me in the "oil is...

Are engine oils blended to meet a price point or performance level?

We'll get to that right after the thick v thin and UOA v wear metals issues are settled and agreed upon by all. Edit; After this thread runs its course, I'm starting a Fox v MSNBC topic.

I've been using Petro-Canada's "OG" series grease for over 20 years with good results.

Because they are booked solid for the next 90 days working on million dollar farm machinery?

Some manufactures' branded 2-stroke engine oils have tracers for warranty purposes.

I like the Hankook DH 07s www.prioritytire.com www.simpletire.com