Looks like Shell hopped on board now that they all claim 10k-25k miles. (Valvoline is the only one left yet to declare a longer drain interval).
They also make a non-GTL Pennzoil Synthetic rated for 10k/one year.
*not sure if this has already been posted.
They also make a non-GTL Pennzoil Synthetic rated for 10k/one year.
*not sure if this has already been posted.
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