Many here recommend Rotella 5w40 or other HDEOs across the board... So I looked up prices at WalMart... My question is - does Rotella really clean so good that it is worth the 15% price increase over Mobil 1 products? The Delo 5w40 is considered by many as the cheap alternative to Rotella (I do not agree there), but it still comes out more expensive than Mobil 1 products! Here are the current prices at WalMart:
-Rotella 5w40 $5.34/qt (21.36 per gallon)
-Mobil 1 15w50/0w40 $4.58/qt (22.88 per 1.25 gallons)
-Castrol 0w40 $4.59/qt (22.97 per 1.25 gallons)
-Delo 5w40 $4.99/qt (19.97 per gallon)
-Mobil 1 Turbo Diesel 5w40 $6.71/qt (26.83 per gallon)
Here is my take on it - use Mobil 1 15w50 in above freezing temperatures, and use 0w40 below freezing. Best price and an oil that is actually meant for gasoline engines, whatever that means. And many UOAs here show great performance from these oils. Your 5.3 will not complain. Just stay on a synthetic diet to minimize the long term damage to the turbo.