- Joined
- Dec 24, 2024
- Messages
- 67
My car is a fully built "racing" motor with forged internals and looser tolerances than factory. The first thing I really noticed which is a rather big difference is that before with either Penzoil Ultra, Rotella, or VR1 in anywhere from 5W-40 to 10W-30 I would have rather loud cold start with piston slap until the motor got up to temperature some and the metal parts had time to expand.
For some reason with this Mobil 1 0W-40 EU formula my motor has no piston slap that I can hear at all and overall the motor is much more quiet. I did not expect this at all...
Oh and my Moroso oil pan leaks A LOT more with this Mobil 1 than the other brands. In it's defense though I am using a different nylon washer so maybe that is the problem. We will find out next oil change.
For some reason with this Mobil 1 0W-40 EU formula my motor has no piston slap that I can hear at all and overall the motor is much more quiet. I did not expect this at all...
Oh and my Moroso oil pan leaks A LOT more with this Mobil 1 than the other brands. In it's defense though I am using a different nylon washer so maybe that is the problem. We will find out next oil change.