I've leaned from this site that non-mineral oil in the SLS in my 83 300TD will ruin the seals. I got to wondering what exactly is mineral oil? A web search didn't turn up much more than this:

1. Any of various light hydrocarbon oils, especially a distillate of petroleum.
2. A refined distillate of petroleum, used as a laxative.

Since it seems like mineral oil is a petrolium distallate, would using a hydraulic oil (also a petrolium distallate?) adversely affect the seals?

Thanks,

Chuck

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1983 300td 240k (down with bad tranny)
1984 300d 222k (daily driver) "Olive"
1997 GMC K2500 105k (sled dog limo)

"The scenery in ANWR is as spectacular as the Grand Canyon and the wildlife is more impressive."

Are you talking about lubricating oil or fuel oil?

It is used as hydraulic oil in the Self-Leveling Suspension system. I've read here that using petrolium based oils (power steering fluid?) would eat the seals in the SLS system.

__________________
1983 300td 240k (down with bad tranny)
1984 300d 222k (daily driver) "Olive"
1997 GMC K2500 105k (sled dog limo)

"The scenery in ANWR is as spectacular as the Grand Canyon and the wildlife is more impressive."