Difference between SAE 30 weight and XW30 ?

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1,715
Location
Texas & BWI Area
I have pondered yet another mystery while cruisin the freeway this evening. My service manual does point out that an SAE 30 oil can be used in lieu of the 10W30 factory fill. Is Chevron Delo Synthetic? And if so what base oil group?
 

J

Messages
434
Location
Berkeley
quote:
Originally posted by outrun: My service manual does point out that an SAE 30 oil can be used in lieu of the 10W30 factory fill.
Hi, Don't use SAE 30. It can lead to more cylinder wall wear. Just ask MolaKule and Bob. xW-30 has viscosity modifiers which allow oil to flow at cold temperatures as well as provide sufficient protection at high/operating temperatures. thanks Jae
 
Messages
6,388
Location
Washington St.
10W-30 has passed a cold temperature viscosity test at -25°C. SAE 30 wt. does not have a cold spec. They're both about the same viscosity when hot. There are fifteen different Chevron Delo motor oils sold in the U.S. The usual Delo 400 is not synthetic. There is a Delo synthetic, but it's probably only sold in cold winter areas. It's probably a Group III base. Ken
 
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