|
A good friend of mine is a mechanic for an area fire department. The life of their equipment engines has been considerably lengthened (as in DOUBLED) since they went to the Shell Rotella 15W-40. He swears it cleans the crap out of an engine, gas or diesel, better than anything he's ever seen.
If you try it on a change, and it immediately turns black, that means it's doing its job ! Remember, that's garbage that's no longer in your engine ! You might want to shorten the change cycle the first time if it is (maybe 1500 instead of 3000). Then see if it takes longer in the future to turn dark.
I bought a '95 964 with 97K on it, and used the Rotella T for the first change. It was literally coal-black in 100 miles ! Changed it prematurely; still turns dark, but nothing like the first time. NO visible sludge in the top of the engine. I go 3000 between changes now.
He knows a heck of a lot more about engines that I could ever know, and he swears by the stuff......and his own personal vehicles are in top shape, as well.
Granted, the syns (Mobil I, etc.) are good -- but you have to decide the cost-benefit ratio, given your finances, the age/condition/retention period of your car, etc., etc......
|
