Used Rotella T6 in an 2004 F-150 with 200,000+ miles that was having camshaft phaser issues. The semi-sythetic 5W20 recommended oil would not hold 20 psi at the camshaft. Went to full sythetic T6 - 5W40 oil and the phasers worked fine. Used this oil through a full winter with temps down to -20. Pick-up started fine all winter. Kept it another 12,000 miles and traded it the next summer. Never had another issue with oil pressure. Also use it in my diesel side by side. 5W40 is recommended in that utility vehicle for all temperature so it works year round.

I've been using T6, 5w-40 in my Terex diesel mini-excavator for four years. Cool runner and easy starts in cold weather. No engine problems or abnormal noises. Price is good with the rebate program. As an aside, I'm wondering if the motorcycle guys may have a "wet" clutch which normally requires a NON-synthetic oil.

I use T6 5W-40 for all non catalyst engines from small engines to tractors and older gas trucks. I live in ND where the temps range from -30F to 100F in a season and this oil has performed excellent in both gas and diesels. The only thing that sucks is the ZDDP will smoke o2 sensors in newer vehicles so I quit using it there. Nice to have one oil do the job of three.

Good store with lots of choices

Great price

Quite a good price for a full synthetic motor. The 5W-40 works well throughout the winters here in Washington. It seems have a good following at many of the diesel forums, and my Ford 6.0 diesel keeps piling up the miles while running on it.

I have been using the Rotella T4 15w40 in my Honda Goldwing GL1100 for a number of years. Smooth transmission and no clutch slip. 82000 miles done and no problems. The T4 along with T6 is JASO MA2 compliant.

Iv ran a few different oils in my race bikes and ever since the switch from A recommendation from my father that has a gold wing with 90,000 miles no issues my race engines show very very minimal wear and tear in between seasons

In my motorcycle - 2015 BMWR1200GSA - for over 80,000miles In my 2001 Nissan Pahfinder with VQ35 engine. In my Honda scooter (not that the scooter cares what oil it gets) 6.0 Powestroke diesels love this stuff. (I used to be a diesel mechanic)

Been using this in an F250 Diesel pickup which is used mostly for towing heavy loads. Excellent performance and keeps my engine at the top of the game.