Hello ,
My 2000 Ford Conversion Van with the 5.4 litre calls for 5W30 ... At times in the summer I tow heavy , usually at the weight limit allowed ..
I am considering the switch to Mobil 1 , since I take the vehicle off the road for winter and start up every few weeks , I figure the start up oil circulation in N.Y. winters would be better with the synthetic , but my concern is during summer towing , since the oil is a bit thinner , upon normal or a bit above normal operating temperture , might I be doing some premature wear on my 5.4 ? I hate to go a little heavier in summer with the oil as this vehicle is still under warranty till 2004 and the manual strictly calls for 5W30.... comments would be appreciated ... Larry B. ![[LOL!]](/forums/graemlins/lol.gif)
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