99Silverado half ton 46,000 94 Suburban 95,000 it has been changed at dealer but last time i dont think they touched it? Silverado has never been changed,easy driving on both what should i do???
I have 4 vehicles and 2 stay in the garage,sometimes i have to take them out and drive at least 20 miles or more once a week?Sometimes when i change oil at 3 months i have only 400 miles on it.I was wondering if it would hurt to use this in one of my daily drivers like a 88 caprice with 70,000...