Can I use synthetic oil on my truck?

I drive a 2003 ford f 150 4.6 engine and it's time get an oil change.is it ok if I use the synthetic oil instead of high mileage one it take 5 20 and it has a 169000 miles on it

High mileage oil's primary feature is that it has additives that swell gaskets in order to prevent leaks if any have developed. If you have no noticeable leaks, I believe it would be fine to use synthetic. High mileage is usually a synthetic blend, full synthetic will last a slightly longer amount of miles before needing a change

Ford advised, and was shipping vehicles from the factory with, SAE 5W-30 motor oil in the majority of their engines since the 1990s. Then in January 2002, Ford issued a Technical Service Bulletin now recommending the use of SAE 5W-20 instead of SAE 5W-30 motor oil. The 4.2-liter V6, 4.6-liter V8 and 5.4-liter V8 from 1997 to 2002 were all listed as vehicles to be serviced with the new recommendation. It was "an improved formulation to improve fuel economy." From 2002 onward Ford recommended SAE 5W-20 in almost all of their engines (4.2-liter to the 6.2-liter); the exception being the 3.5-liter EcoBoost. They recommend SAE 5W-30 for the direct-injection six cylinder.

You can switch to synthetic oil at any time. Age and/or mileage on the engine does not make a difference.

It is better to seek professional advice from a goo garage.

Valvoline makes a synthetic high mileage oil. Besides seal conditioners, HM oil also has additional detergent and friction modifiers and oil film strengtheners.

The question is a valid one from the standpoint of the miles on the vehicle. Synthetic oils have a flat molecular structure. Organic oil has a clumpy molecular structure. That is what makes synthetic oil retain a fluid state in colder weather, to stick to engine components much better and to reduce friction in the moving engine parts. As the engine wear out and the metal parts wear our, the gaskets get compromised, etc. The thinner the composition of the oil is not suitable. Synthetic oils have a major advantage over organic as in to prevent wear and as to completely minimize the chance of oil sludge build up. I suspect this is a new vehicle for you and as such you wish to do things for the vehicle. Why you have at truck is another discussion but the fuel bill alone is going to be rather steep. I estimate $250 to $300 per month depending on miles driven and the geography. I used 1,000 per month at an average of 12 MPG. You can do your own budget. To add the expense of synthetic oil might not be advisable. The next level is synthetic blend. I use that in both my cars. One has close to 100,000 miles and I have owned since 8,000 miles. The oil gets changed every six months. The engines are clean as if from the factory. My best advise is to try synthetic blend ONLY if the engine is in excellent condition and if by looking via the oil service port you can see a clean engine. Even so, since these oils are super detergent, once you place the synthetic blend in the engine you must monitor carefully the amount. Check it once a week. If all is OK and the oil level does not decrease after one month, then drain it and add more. This will clean out whatever might be floating in the oil system. I used to sell synthetic motor oils and I learned the hard way that the allure of once a year old service drove many people to try the oil but the condition of the car engine did not merit the oil. Best read more online information as to these oils. If in doubt, good regular motor oil of the correct viscosity will be absolutely fine. What about the coolant and transmission and brake fluid service?

The use 5W-20 Mobil1 should allow your Discontinued Ford motor to last longer.