heavy duty heavy duty oil that works as hard as you don't forget carquest heavy duty filters by baldwin shell rotella engine save $6 shell rotella t4 conventional heavy duty motor oil gallon fram heavy-duty conventional engine oil convencional fara sa save $3 fram conventional heavy duty motor oil shell rotella engine oil toal save $5 shell rotella t5 synthetic blend heavy duty motor oil gallon fram heavy-duty full synthetic engine oil save $3 fram full synthetic 5w-40 heavy duty motor oil gallon shell rotella valvoline premium blue save $5 shell rotella t6 full synthetic heavy duty motor oil gallon ela save $4 valvoline premium blue heavy duty motor oil gallon