How are they both 15w-40? Im not following that.... Rotella Synthetic is 5W-40
Anyways Im not dead set in using synthetic oil..Most likely the previous owner didnt as I found he used Jiffy Lube oil filters. I'm going to try out the regular 15w-40 Rotella this weekend as its about 1/2 the price of the synthetic. Thanks Chris
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99 D1
73 Series SWB
95 RRC LWB - Sold
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