92 Sun Voyager 5.9 oil differential oil

[Washington T]

I know it takes 75-90 gear oil. Is there a special oil requirement? And can synthetic be mixed is there a benefit ?

[twinboat]

Originally Posted by Washington T

I know it takes 75-90 gear oil. Is there a special oil requirement? And can synthetic be mixed is there a benefit ?

You can mix synthetic with conventional oil but the benefits of synthetic will be diluted by the conventional oil.

Doing a complete change involves pulling both wheel hubs, since they are supplied by the center differential and hold a quart of oil or so.

[Soppy]

Synthetic can be mixed with regular oil , but I wouldn't bother unless it is called for by the manufacturer . Synthetic will sometimes leak at the seals where as conventional oil will not.

[Washington T]

Thanks for the replies. Have done ton's of vehicles but not a Motorhome still in learning curve. Added synthetic. I am a mobile 1 fan for years.