My perfect oil = what I currently use now:
1. Pennzoil Platinum during spring/summer/fall for Corolla.
2. Amsoil SS0 0w-30 for winter time use only in both vehicles.
3. Pennzoil YB/Formula Shell when its on sale in 5w-30 for my Saturn.
I think the ultimate (and it would be a top seller) is a Pennzoil Yellow Bottle good to 10K.
1. Pennzoil Platinum during spring/summer/fall for Corolla.
2. Amsoil SS0 0w-30 for winter time use only in both vehicles.
3. Pennzoil YB/Formula Shell when its on sale in 5w-30 for my Saturn.
I think the ultimate (and it would be a top seller) is a Pennzoil Yellow Bottle good to 10K.
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