Thread: Mobile 1 esp x3
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Old 07-29-2022, 10:14 AM   #8
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Originally Posted by Classic Muscle View Post
Excuse my ignorance but why are people running ESP oil? Our cars don't have the exhaust particulate filter like Euro cars that requires this type of oil do they?
Because they are DI and the normal oil with high TBN number and high ash oil has soft metals the stick to the intake valves.

Esp oil has a lower TBN then the normal line of oil and a lower ash number.

I laugh at the amsoil people high TBN and high ash. It's great oil no doubt but it will lead to more carbon on the valves. The so called wear additives and additives that make the oil last longer are the same components that stick to the valves.

Do some research and you will see.

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