I do not use auto oil. Motorcycles run hotter and I don’t trust car oil. I use Red Line. They sell a V-Twin kit that has engine oil primary oil and transmission oil, and fuel system cleaner. I buy one each spring.
Previous comments about mobil 1 are right it’s best for reliability - castrol are seen as high performance oils
5W-30 Castrol Edge. FPRS uses it and has had very few failures on stock motor cars. I was also running it in my GR86, and Blackstone came back perfect on that car.
Redline 5w30, the best
Castrol in my daily driver. The daily would have a slight ticking when warming up with other brands, not with Castrol, so I been using it for over 100k with no issues.
Have a look on Amazon they do some good deals on oil, I normally stick it in my basket and wait for it to drop.
My old car was Castrol 5w30 Magnatec, £28.50 for 4l on Amazon £43.99 from euro.
Using Castrol EDGE Euro 5W-40 after watching a EN owner on YouTube suggested it. Car runs great in this 110 plus days in Texas
I did 100k on Castrol gtx in an f4i plus tens of thousands on other bikes using the same oil. I buy it in bulk and it goes in the whole fleet.
I'm using Castrol GTX 20W50 because it's the only 20W50 that I can easily find locally. I tried Rotella 15W40 but I found that it gave somewhat low oil pressure on my old engine.
I've tested both those oils, and was not impressed with the results. Both oils still needed changing at 5k.
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