So, What's the best oil for me?

[E'sStrokr01]

What's the best oil for my soon to be mild to moderately modded 2001 F-250
7.3L? My truck has 200,000 miles and I've heard that going with a synthetic could cause leakage around the seals (due to the miles and age of the engine)?? What would be a good oil for a high mileage yet somewhat performance motor???

Thanks

[apeterbilt5151]

I run Delo 400 15/40 in my 2000 Excursion 7.3 and in my big rig. I use either Wix or Baldwin oil filters in both. Run Lucas oil additive and fuel additive also in both. I do an oil anaylsis every other oil change and have no breakdown of the oil. Change oil about every 7000 miles on Excursion about 12000 on the rig. Have been running Delo for about 30 years. This is what I use, hope this helps you out. Have 1.1 million miles on the rig. Good luck

[dalton1]

I use nothing but motorcraft oil and filters

[Rob454]

I run Delo 400 15/40 and motorcraft filters. Nothing else

[billelf123]

Anyone like Royal Purple?

I heard some good things about it, just not sure it is right for a 7.3L. I tried Amsoil and didn't like it, currently use Valvoline Premium Blue Engine Oil and have no complaints. Thinking about trying Valvoline Premium Blue Extreme Engine Oil full synthetic.

[billelf123]

[E'sStrokr01]

Anybody Else???

This is my first powerstroke and I have no idea what's in there now, nor do I know what has been used for the last 200K. I know that to most people oil is just oil but if all it's had for close to 200K is regular ole' oil, would it be a bad idea to go to a synthetic now???

Thanks

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Last edited by E'sStrokr01 : 06-27-2009 at 07:03 PM.

[BigRed02]

I have used Shell Rotella in all my diesels, especially in my old GM 6.2L, which it did wonders for with the smoke issue. You can pick it up at Walmart for about $11/gal I just go with motorcraft for my filters. Oh and Welcome to to the ORG

[ianstew]

Originally Posted by dalton1

I use nothing but motorcraft oil and filters

cant go wrong with motorcraft!

[Slartibartfast]

in most warm weather situations, 15W40 is called for. I like the Shell and Motorcraft myself. My truck sees winter, and doesn't get run very hard, so I run Motorcraft 10W30 (CJ4) all year. Seems to start easier with lighter oil.