Michael (Phoenix )
I live in Phoenix where day time highs in the summer can be 117, lows in the 90's. Winter months high in the 70's lows around 30-40. I use 10w-40 year round and never had a problem with this brand, changing ever 5K miles. If this can withstand Phoenix heat, it will last against any heat in the US. --- 2005; Yamaha FJR 1300
Andy (Brooklyn )
I only use castrol oil. It's stays that nice clean honey color for longer than the others. My bike always shifts smoother after an oil change.
John K (Woodstock )
I don't own a motorcycle, but this is the only brake fluid I use in my MGs. It used to be called Castrol LMA brake fluid. It works great in British cars and doesn't attack the rubber parts like other fluids do.
Vince (Queenyville )
patrick (Alma )
We got a 1982 Yamaha dirtbike and this oil works great in it more power and good fuel mileage, I’m sold.