Delvac 1300 15/40 in gas engines.

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I am about to try switching to 15W-40 in the ol' 4.3 V6. The 20W-50 was for this past summer, but it is a bit thick for in the winter. The AT-205 Reseal has helped enough with the valve seals that it doesn't smoke out the entire neighborhood when I start it up. I will probably go to Walmart and pickup a 2.5 gallon jug of Delvac 1300, along with some kind of Fram that isn't orange.
 
Originally Posted By: eyeofthetiger
I am about to try switching to 15W-40 in the ol' 4.3 V6. The 20W-50 was for this past summer, but it is a bit thick for in the winter. The AT-205 Reseal has helped enough with the valve seals that it doesn't smoke out the entire neighborhood when I start it up. I will probably go to Walmart and pickup a 2.5 gallon jug of Delvac 1300, along with some kind of Fram that isn't orange.


Never mind. Walmart's shelves were almost empty of Delvac, and Rotella was a bit expensive. Supertech 15w-40 was only $9.44/gallon, so I got two jugs of that for the ol' truck. That, and a Fram TG3980. Truck will live.
 
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