I wanna do some oil changing in my rig, 90' Spfi, on the fly, loyale. I wanna change MTF and diff oil. I wanna use some synthetic, I think and don't know which weight to use or brand, Lucas oil or Red line etc etc etc

 

I would also LOVE if somebody could help me with the specs or how much I need for the gear oil.

 

THANK YOU and ALL input is welcome and respected.

 

 

-Nomad

an owners manual really helps with this and lots of other kind of stuff.

80w90 is called for in owners manual i believe.

 

.8 quarts or so for the rear diff. it's less than a quart.

 

trans is like 3 or 4 i think.

I looked in my "how to keep subaru alive" book and couldn't really find info on it, just on motor oil, Thanks for the info

 

 

 

-Nomad

i think i always have 4 quarts ready for a change. takes more than 3 but not all of the fourth.

i think i always have 4 quarts ready for a change. takes more than 3 but not all of the fourth.

 

You running synthetic? brand? I've been reading mostly about the redline stuff and the lucas oil stuff...

 

 

 

-Nomad

Pick up a Haynes manual for these vehicles (cover all 1600 and 1800 cc motors) for like $15.00 and you'll have all the information like this you will ever need and more.

I won't suggest Synthetic Oil, 'cos it could Damage the Seals... they aren't Prepared for it.

I Suggest 80w90 or 85w90 but GL-5 as Quality Level.

Kind Regards.

Pick up a Haynes manual for these vehicles (cover all 1600 and 1800 cc motors) for like $15.00 and you'll have all the information like this you will ever need and more.

good call. you could probably even post in the parts wanted forum, someone will have one lying around they'll probably give you for cost of postage probably. i probably have a bunch of Xt manuals which are EA82's, but better to get something vehicle specific.

 

we also have the Subaru factory Service manuals for free downloadable at subaruxt.com. lots of similar parts - same engine (slight intake differences), same transmission, same drivetrain, same suspension, etc. some differences but lots of similarities. fluid quantities would be the same.

I won't suggest Synthetic Oil, 'cos it could Damage the Seals... they aren't Prepared for it.

I Suggest 80w90 or 85w90 but GL-5 as Quality Level.

Kind Regards.

 

 

Really? Synthetic is bad in this case? I'm running full synthetic motor oil already and have read nothing but good things about the synthetic gear oils...

 

-Nomad

there's other threads discussing the disadvantages of synthetics or additives with subaru manual transmissions. actually while searching earlier today for something i saw threads where folks had notable increases in gear grinding and other issues with Redline or other aftermarket stuff and then folks talking about using el-cheapo stuff or dino oil and making it smooth again. just regurgitating, some of what i read today.

there's other threads discussing the disadvantages of synthetics or additives with subaru manual transmissions. actually while searching earlier today for something i saw threads where folks had notable increases in gear grinding and other issues with Redline or other aftermarket stuff and then folks talking about using el-cheapo stuff or dino oil and making it smooth again. just regurgitating, some of what i read today.

 

yeah there is no grinding or anything and shift just fine (2nd clutch) but I think its time to give her some fresh fluids....but as for the read diff, I probably got the stock oil which could be like soup now...Just wanna keep her maintained

 

 

 

-Nomad

Anybody have anymore input before the trip to the parts house? time is ticking:lol:

 

 

 

-Nomad

Ive actually found that thinner is a slightly better for smooth shifts. I use 75w90 in mine. Non-synthetic. Ive heard multiple things back and forth about synthetic vs non- synthetic. I too am using synthetic motor oil but my gear oil is just normal non-synthetic. I really dont see how running synthetic will do any harm. Just make sure it doesnt have a friction modifier in it (think LSD rears). I was one that experienced grinding and such when i went for that one because it didnt allow the syncros to line up correctly. Swapped it for normal oil and all was well. Im sure if i switched it for normal synthetic as well i would have been fine.