Lone Star Stangs | The Texas Mustang Club - View Single Post - Will changing motor oil weight cause any damage or void my warranty?

2k4mk1 · 12-31-2003, 11:23 AM

As long as the oil meets the MFG SPECS. called out in the owners manual the weight (viscosity) makes no diff to warranty coverage. They switched to all these light wt oils primarily to help increase gas mileage. Just my .02 :jeff:

12-31-2003, 11:23 AM	#4
2k4mk1 DONT HATE ME CUZ YOU AINT ME!!!! Join Date: Dec 2003 Location: SanAntonio Posts: 6,379 Trader Rating: (2)	As long as the oil meets the MFG SPECS. called out in the owners manual the weight (viscosity) makes no diff to warranty coverage. They switched to all these light wt oils primarily to help increase gas mileage. Just my .02 :jeff: