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Blue-Truck-Nut · 11-27-2019, 01:19 PM

The above post is really accurate. Filters make a BIG difference. Especially an air filter.

Concerning T4, or any Diesel specific oil, they are intended to "pick up" soot, which is much more of a problem in diesel engines. So yes, it may appear darker, sooner. I wouldn't sweat it any, we've been running diesel oil in ours for generations.

Side thought, I'd rather drain dark oil, than have all that stuff stuck to the engine internals.

Disclaimer: this is an opinion, not scientific fact, but based on experience.

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11-27-2019, 01:19 PM	#3
Blue-Truck-Nut Member Join Date: Jul 2019 Location: Central New Mexico Posts: 83	Re: Rotella T4 oil, dirty oil The above post is really accurate. Filters make a BIG difference. Especially an air filter. Concerning T4, or any Diesel specific oil, they are intended to "pick up" soot, which is much more of a problem in diesel engines. So yes, it may appear darker, sooner. I wouldn't sweat it any, we've been running diesel oil in ours for generations. Side thought, I'd rather drain dark oil, than have all that stuff stuck to the engine internals. Disclaimer: this is an opinion, not scientific fact, but based on experience. Sent from my E6810 using Tapatalk