Synthetic Help

[Jake_2010]

I have a e99 F-250 with 135,000 miles and i was wondering if it would be alright to switch to synthetic or would that be a bad idea? I have heard tons of horror storys about seals rotting and other junk?

[JEL]

That's an old wive's tale, there are no issues with synthetic in our motors. I've run it with more miles than that and had no problems, you can even go back to dino if you wish.

[DrewGerhan]

The previous owner of my truck used all 15w-40 Rotella. I switched to T6 back in August and have had zero problems with it.

[jesilvas]

Perfectly fine to do. The only thing I wouldn't do is flip flop each oil change between syn and dino

[Jake_2010]

Alright is there a best brand for the truck or doesnt it really matter?

[JEL]

Originally Posted by jesilvas

Perfectly fine to do. The only thing I wouldn't do is flip flop each oil change between syn and dino

Why is that? I know a lot of guys who put maybe 10-15k a year on their rigs go to synthetic in fall and back to dino in spring, but usually those are the only two changes they do each year. Is there a problem with the chemical makeups? Just curious, I've done synthetic in December then back to dino in March at the subsrquent oil change.

[JEL]

Originally Posted by Jake_2010

Alright is there a best brand for the truck or doesnt it really matter?

Most guys who run synthetic really like the Mobil 1 TDT and Rotella T6, they are both easily found at Wally World or any auto parts shop, and are pretty inexpensive, but perform excellent in our trucks.

[rufushusky]

Originally Posted by JEL

That's an old wive's tale, there are no issues with synthetic in our motors. I've run it with more miles than that and had no problems, you can even go back to dino if you wish.

^^^ agreed!

Originally Posted by jesilvas

Perfectly fine to do. The only thing I wouldn't do is flip flop each oil change between syn and dino

I have gone back and forth from PAO based, hyrdocracked synthetics, blends and conventional all the time...not an issue yet on any vehicle I have ever owned.

Originally Posted by Jake_2010

Alright is there a best brand for the truck or doesnt it really matter?

"Best" is a tough word to define, really there are a lot of good options rotella T6, Mobil 1 TDT, Delvac 1, Amsoil, Schaeffers etc etc.

Really your wallet will care about what oil you use more than your engine IMHO. Based on my budget and operating conditions I run Rotella t5 10w-30. Seems to be doing just fine, just give how your operate your truck some thought and see what oil fits your operating conditions and budget. Really there are a lot of good synthetics so long as it is a C rated oil you can't go wrong.

[COP-OUT]

I have an early 99F350 7.3 CC,LB 6spd. I have been running Rotella 15W40 all year long. I live in Montana where it sometimes gets pretty cold. What would be a better oil for the winter months. I pull an enclosed 4 place enclosed snowmobile trailer in the winter. The trailer is 3300 lbs. and the sleds are about 500 lbs a piece.
Thanks Ron

[JEL]

Originally Posted by COP-OUT

I have an early 99F350 7.3 CC,LB 6spd. I have been running Rotella 15W40 all year long. I live in Montana where it sometimes gets pretty cold. What would be a better oil for the winter months. I pull an enclosed 4 place enclosed snowmobile trailer in the winter. The trailer is 3300 lbs. and the sleds are about 500 lbs a piece.
Thanks Ron

T6 Rotella or Mobil 1 TDT 5w40 would be good for you.