Thoughts on running Rotella 5w-40 in a 3FE?

[cwwfj60]

yes that's typically what is in hm oil, I don't particularly care for that in my oil.

 

[studawg]

yes that's typically what is in hm oil, I don't particularly care for that in my oil.

why not?

 

[cwwfj60]

Because I don't want to swell my seals, or have unnecessary stuff in my oil. trans fluid will do the same thing....shade tree way to swell seals. through my trucks life with me I have slowly fixed every leak, replacing every engine gasket, including rear main, and did valve stem seals when I replaced the head gasket....so I had no need. That being said I have a slight knock developing under load so I should probably recuse my self from this conversation

 

[CruisD64]

Reviving an old thread...sorry

I'm going to be changing my oil tomorrow in my FJ62 and was wondering if anyone has run Rotella T6 (synthetic) 15-40 in their motor. I've been running T4 of the same weight and it was a big improvement. Just wondering if there would be any additional benefits to T6. Thanks!

 

[kirvesmies]

The lower number is the weight of the oil at start-up. The second, higher number is the minimum intended weight achieved after warm up.
warm up temp is somewhere 100~120 degrees. If you're in a warm enough climate a straight 30 weight is a better engine protector.
Multi-vis oils contain viscosity enhancers. Viscosity enhancing chemicals do not add to lubricity of oils. The greater the viscosity range
the more enhancers in the oils so technically have less pure oil per volume. Multi vis oils were designed strictly to aid in cold weather starts. Single grade oils provide more corrosion resistance because they cling better to parts. Synthetics have higher lubricity but because of their lower viscosity at room temps tend to strip off internal parts faster.
Semi synthetics were the attempt to bring the superior lubricity of synthetics together with the superior corrosion resistance and cleansing
properties of pure oils together.

@CruisD64 , read this. some food for thought

 

[kevin in okinawa]

15w-40 and 5w-40 are the same in Florida...

You know the first number is the temperature at which the viscosity is affected right?

The second number is the viscosity at operating temperature.

For example, 10w-50 is thicker then 0w-30 in a warm climate.

thank you for the tutorial!