2002 Silverado
AMSOIL ATM 10w-30
EaO32 filter
6k miles
7% OLM
134k total miles
AMSOIL ATM 10w-30
EaO32 filter
6k miles
7% OLM
134k total miles
I thought the XL was good up to 7500 miles.4/14/13
2009 Silverado
Amsoil XL 5w30
Donaldson Filter
3500 miles on oil
OLM went to zero % !
33,000 Miles on Vehicle
Also changed Donaldson PowerCore Volant filter for first time. 33K on filter rated for 100K. Will likely never change another Air Filter on this truck again as long as I own it.

I thought the XL was good up to 7500 miles.4/14/13
2009 Silverado
Amsoil XL 5w30
Donaldson Filter
3500 miles on oil
OLM went to zero % !
33,000 Miles on Vehicle
Also changed Donaldson PowerCore Volant filter for first time. 33K on filter rated for 100K. Will likely never change another Air Filter on this truck again as long as I own it.![]()
I agree.I thought the XL was good up to 7500 miles.4/14/13
2009 Silverado
Amsoil XL 5w30
Donaldson Filter
3500 miles on oil
OLM went to zero % !
33,000 Miles on Vehicle
Also changed Donaldson PowerCore Volant filter for first time. 33K on filter rated for 100K. Will likely never change another Air Filter on this truck again as long as I own it.![]()
XL is good up to 10k miles now. But since he saw a ton of idle time, it was probably good to have changed it out. More than likely it has high fuel dilution.