I use MC semi-syn 5w-20 and a MC filter, change interval of 5K miles. I can buy the 5qt jug, two extra single qts (the 04-up 5.4's take 7 qts) and the filter at wally world for about 22 bucks.

 

I go to my dealer and get MC5-20, and MC filter for $25. They change it in about 30 minutes, look over the truck and I am gone.

 

 

Can't go wrong with the MC filter. I use it along with full synthetic oil and still change my oil every 3k. Some say it's a waste of money, but $30 every 3k and knowing my truck always has clean oil is worth it to me.

 

How do you get full synthetic at that price?

 

I know someone

 

It doesn't cost that at Walmart?

 

I've been using Motorcraft full synthetic, they don't sell it there. You can get the blended stuff there, though.

 

Heck i got 5 quarts of M1 full synthetic 5w 20 in the big jug for 21 bucks tack on the MOTORCRAFT filter thats 25 then the 2 extra quarts i was right around 35 or so......walmarts in MD sell Mobil 1 oil and filters

 

I just use Motorcraft oil and motorcraft filter. I figure that if its made for Ford to be used in Ford vehicles, you cant go wrong. Right?!

 

Same thing I do. The jug that has 5 qts. at Walmart is the same one that has 4 qts. at parts stores. Same price too.

 

Call me crazy, but this is what I do. Oil:M1 Ext. Performance Oil Filter:M1 Ext. Performance filter. Walmart doesnt sell the 5w-20 in the 5 quart jug in that particular oil so i have to buy by the quart ($7 a pop!!). At 5,000 miles I change the filter and add a quart of oil, and then change completely after a total of 10,000 miles.

The oil says that it is guaranteed for 15,000 but I dont let it go that long.

 

Only criticism is there's no need to change the M1 filter at 5k, it's good for well past 10k. I do the same thing - M1 EP and filter, change both at 10k.

 

Has any one ever used or heard any info on Royal Purple oil?

 

Yes, it's good oil.