oil change frequency

[diablos30]

after reading quite a bit here this is what i am going to do regarding oil type and changing frequency;

rotella t 5w40 synthetic year round that will be changed every 10k
motorcraft filter that will be changed every 5k

thoughts?

[topdwg]

I'd change the filter every 5K like you stated, but I'd also do an oil analysis too. What's another $20 for piece of mind...

[HeavyAssault]

I use the OEM interval of 7500 miles. I change my Oil Guard By-pass kit filter every other oil change and the main filter every oil change.

[topdwg]

Originally Posted by HeavyAssault

I use the OEM interval of 7500 miles. I change my Oil Guard By-pass kit filter every other oil change and the main filter every oil change.

Are you running synthetic?

[HeavyAssault]

Yep. Mobil 1 or Valvoline Extreme 5w40.

[diablos30]

do you tow alot or drive in conditions that require you to change it out that much, or is it more for a just in case thing?

just gathering info, i thought sythetic should be able to go 10k with a filter change.

[MoyockPowerstroke]

Same as HeavyAssault...only use Mobil1 5w-40, change primary oil filter with only Motorcraft at 7500 miles. I also use Amsoil's EaBp 100 >2 micron bypas filter and change it every other oil change or at 15,000 miles. I do dump the EaBp filter and thouroughly clean the top and refill it with oil as well before adding new oil to the system. I also use the Fumoto drain valve which helps (less mess) and a have a silver dollar sized magnet near the drain plug (since I no longer have the old drain plug magnet).

[Dan"gerous"]

I've read a few reports that the Rotella 5w-40 loses it viscosity pretty quick in the oil shearing 6.0. I'm trying Mobile 1 diesel this time around.

[redsmoke]

Without a oil bypass kit I still couldnt see going 5000 miles in between oil changes. The guy before me changed his oil every 5 thousand miles and ran normal 15w40 and man you should see my injectors. They are all gummed up and burnt oil on them. After seeing that I couldnt even run synthetic oil 5000 miles without changing oil.

[HeavyAssault]

I researched OA's, oil reports till my head was ready to melt. I discovered the majority of users running bypass kits were only getting 10K (maybe better) out of the oil. So why tempt fate? I use the OEM interval of 7500 miles but I don't exceed 10k between changes. Sometimes work or other requirements will cause me to go above the 7500 so I try to stay under 10k at that time.

These motors aren't picky they just need clean fluids. I spent the money to get this motor and damn sure going to take care of it as best my knowledge and the knowledge we share will allow.