The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - got my first oil change and gas milage took a nose drive

gmclowsierra · 12-06-2011, 08:31 PM

boy you guys are missing the point. does it really matter what oil hr did or didnt use. its not going to change the way the engine works that much. we run 10-30 oil in every gas engine and 15-40 in diesel trucks. it doesnt change the mileage that much if any. my question is did they do anything else. rotate the tires adjust the air pressure. anything like that?

12-06-2011, 08:31 PM	#12
gmclowsierra Registered User Join Date: Mar 2008 Location: williamsport,pa Posts: 329	Re: got my first oil change and gas milage took a nose drive boy you guys are missing the point. does it really matter what oil hr did or didnt use. its not going to change the way the engine works that much. we run 10-30 oil in every gas engine and 15-40 in diesel trucks. it doesnt change the mileage that much if any. my question is did they do anything else. rotate the tires adjust the air pressure. anything like that?