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Wow how ignorant

I use Traveller 15W-40. It’s like $10/gallon and meets all the specs.

I doubt it because their position statement on CK-4 came out very early. Early presentations shows some internal tests with proposed new CK-4 formulations.

I don't think the government is directly specifying anything here. The issue is DPF longevity.

I wish Chevron would test against the Ford -F1 spec. I have a feeling Delo is why Ford took a stand against CK-4 in the first place.

Indubitably.

I'd guess it has to do with aromatic content.

I'd use 5W-40 CK-4. Because you might need to use biodiesel and it's not hard to find yourself operating in what Ford calls "severe service".

Not that it matters, but this is not accurate.

He said the numbers do not lie! What more do you want from the guy?

Red Line 15W-40 Diesel

What does that matter? It breaks down at exhaust temps. The only way it won't crystallize as much at RT is if it contains less urea.

I think we are saying the same thing, within 2 degrees.

15W generally means -20C is acceptable, 10W generally is good to -25C, 5W to -30C, and 0W to -35C.

I'm not sure what problem this product is trying to solve.

Technically DEF is aqueous Urea. That concentration of ammonia would be unbearable.

Don't use olive oil either.

The intent of the Ford -F1 spec was to ensure CK-4 oils did as good as the old CJ-4 oils they replaced in terms of wear on valvetrain. The F1 spec in my opinion would be a good place to look for CK-4 oils that perform similarly to the proven CI/CJ oils. There are tons out there that meet F1. The...

Maybe people figured out it doesn't do anything that T4 can't do for 1/2 the price?

I once knew a guy with a Dodge Caravan. Mitsubishi V6, the ones known for burning copious amounts of oil. The thing fogged the neighborhood every morning and every evening. No mosquitoes anywhere. To sell it, he filled 50% of the crankcase with motor honey. That's that semi-solid slime that is...