That's what I run. It supposedly runs lighter than the specified 40. It's LL-01 approved. I change it every 8000km/5000miles.
AmsOil signature 0w30. It exceeds the factory spec.
The best performing oil for cold starts is probably Pennzoil platinum full synthetic if your particular prius uses 0w-20. It is made from syn gas, and is particularly thin.
For comparison, i got 6,000 miles out of Pennzoil platinum vs royal purple, with which i would get 5,000 miles prior to the oil changing color and about a 1 to 2 percent dip in fuel economy. Regardless of the wear additives, Pennzoil platinum lasts longer, again likely due to the cold start performance and the way the hybrid drivetrain works.
Amsoil ????
I only run Amsoil in everything I own from cars to lawnmowers. I use their signature series, but with the 0W-16 they only have their regular blend.
Haven’t heard anything like that about Mobil 1, but I personally use Pennzoil Ultra Platinum 5w30. It’s performed spectacularly for me.
Penzoil Ultra Platinum will be on a entire different level. Stuff is amazing.
Penzoil platinum held up nicely. A hair thinner and less active additive than Valvoline but wear looks great.
I like Amsoil. A lot of guys swear by Shell Rotella T6.
I have never used anything but Amsoil in my LB7 Duramax for 12 years. It has almost 350,000 miles on it. I use Amsoil in everything from the weedeater right on up to the Duramax. Never one issue, and I only change it about every 20,000 miles.
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