I take my own oil to my mechanics shop. I use Amsoil Signature in my Challenger.
I use it on my 22 street Bob. My mechanic swears amsoil will make it run cooler but idk. I’m going to try the amsoil when my 10k comes up soon. I’ll always run synthetic either way.
I have personal experience with using amsoil in a Cadillac Northstar which are notorious for burning. It did stop that in that car
1.3 million on Amsoil. Shell is a close second.
Amsoil is worth it and head and shoulders above the competition. I used a custom built testing apparatus to characterize dozens of lubricants including oils of all weights from Mobil 1, Castrol, penzoil, valvoline, and Amsoil.
Germany, 320d, 2008, 280000km, Castrol Edge 5w-30. Every 15000km
Castrol high mileage 5w-30 every 3 to 5k
Any other oil I have tried made my lifter tick super loud in cold weather
I use Castrol Edge 0W-40 in my '08 328, N52. Based on used oil analysis from Blackstone Labs, I'm at a 6K mile change interval.
The OEM oil filter worked well to keep insolubles low, and after 8,570 miles on this fill of Castrol High Mileage, the 2.8 TBN shows the oil had active additive to spare.
Former BMW dealer employees have confirmed that the overpriced BMW oil is literally castrol edge.
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