09-04-2004, 10:56 AM
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Join Date: Sep 2004
Age: 74
Posts: 2
Rep Power: 0
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2002 to 2005 T-Birds Oil
Remember that you are using synthetic oils now a days. It is 300 times better than the old fashion 10W30. Besides unless you use Premium Gas and Synthetic Oil you warranty is void in many cars now a days.
   
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Originally Posted by ajsam01
I noticed that my owners manual doesn't list any other weight motor oils as alternatives. That seemed odd to me. I know that Ford "recommends" 5W20 because it allows them to claim better gas mileage ratings. I'm not so sure I agree that oil so light can provide adequate engine protection. I grew up on 10W40 and relucantly changed to 10W30 in the 90s. Am I too old school? I'd really like to run at least 5W30 but not if it means voiding my warranty.
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