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Dear Auto Advisor, I have a 2006 Ford F-250 super duty 6.0 liter power stroke diesel. My question is what weight oil and type is recommended for my truck? As well as what services need to be performed that IS NOT in the owner’s manual? I hear you on your TV show talk about services on vehicles that are not covered in my owners manual. Scott B. Youngstown Scott,

Scott, Let me tackle the weight of oil you should be using in your truck. The book says 15W40 diesel approved non synthetic or 15w40 full synthetic. If it was me, I would use the 15w40 full synthetic oil over the 15W40 non synthetic oil for its superior ability to keep the engine internally cleaner with less carbon build up in the exhaust system. The type oil you use is very important in keeping the oil impurities in suspension. Additives in synthetic oil do a superior job of having large “trash” cans to hold these impurities in suspension. Where regular petroleum oil has smaller “trash cans” that can become full and overloaded in a short period of time. Now to other services that are not mentioned in your owners manual on this truck. 1) Clean the EGR valve every 20 to 30,000 miles. The EGR Valve (Exhaust Gas Recirculation Valve) is OPEN at idle on a diesel engine. It is closed when you are under acceleration just the opposite of a gas engine. 2) For gas engines clean the throttle body and Mass Air Flow sensor every other oil change or every 10,000 miles. 3) Change the antifreeze (using a 50/50 mixture of anti-freeze and distilled water) every 2 years or 30,000 miles. Make sure you add anti-cavitation additive to protect the engine block from being eaten up on diesel engines. (Anti-cavitation additive is not needed on gas engines) 4) Change the fluids in your transfer case and differentials every 30,000 miles using full synthetic lubricants. 5) Replace the air filter every 30,000 miles (no matter what you think it looks like). This type engine uses a honeycomb filter that must be weighed to tell if it is dirty. My advice, just change it and play it safe. 6) Brake fluid needs to be changed every two years or 30,000 miles, same goes for clutch fluid. Both are hygroscopic and WILL absorb water causing damage to the brake/clutch hydraulic system. 7) Power steering fluid needs to be changed every 2 years or 30,000 miles to insure the proper operation or the steering system. 8) Transmission fluid on most cars and trucks from 2006 to present use synthetic automatic transmission fluid. Change every 50,000 miles along with filter. If you tow a lot change every 30 to 35,000 miles. This just about covers the areas that are omitted in the owner’s manual. I know that the newer cars that have extended warranties are now including most of the services I have mentioned above. The advice I gave for your truck applies to ALL car and trucks regardless of year, make or model. The only exception is the EGR valve does not need to be cleaned on Gas engine vehicles, only the diesel engines.


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