I recently traded in my 06 Mustang GT for a 2003 10th Anniversary Cobra. The was owned by an older gentlemen, the car is in excellent condition (mechanicllay and cosmeticly). When I first purchased to car I changed out whatever was in there for Valvoline Syn 5w30, drove for 3000 and then I changed to Penzoil Plat 10w-30. The engine seems quiter and smoother with the Pennzoil in it. Next change is either Pennzoil PLat 5w30 or German Castrol 0w-30. The car has be modified, after purchasing a added a new intake, smaller upper supercharger pulley and a retune. What would be a good oil that is easly to find that works well in a modular engine, even though the internals on this engine are much different than other modular Ford engines. The factory spec is 5w-20, the car usually gets driven normally except for the occasional WOT pull. I use Lucas fuel additive at every fill up, then a clean tank full, and then every 3000 miles I fun the Chevron Techron additive. Finished that tank and then change the oil. I just had great finding doing this, I ran this combo on my 06 and I removed the intake to install the charge motion delete plates and the intake ports and valves looked new at 50000 miles. Since having seen may BMW ports look terrible around this mileage do to either port fuel choice and lack of fuel system maintance. I have heard that the majority on people that own these cars usually use a 0,5,10-30 weight oil. Would I benifit from any thing thicker, like a 0-40? Or should I stick with the 0,5,10-30 weight syn that is on sale at the time? I plan on 5k changes, but would like to peace of mind of a syn do to the potential heat this engines can create. I plan on install a head cooling mod before I upgrade and power and fuel systems.
Thanks
Thanks
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