mini vs scooby

Hi Ppl.My Impreza sti ra m95 is having a engine,diff and gearbox oil changed next week. Instead of the standard stuff thinking of upgrading. Going to go with Motul comp 300v 15/50 but stuck on what oil to use for diff and gearbox?? been told diff and gearbox use different oils if so which 1 is best?? Thx in advance

PeeVee

iTrader: (1)

If you have an everyday car that is running a std box & diff set up, then I personally wouldn't bother with the so called "Upgrading" of the oil used in your transmission.

Subaru's recommendation of Castrol Syntrax (now called Driveline) 75w90 is a very good choice for road going cars.

It's not only a very good quality oil that suits the needs of the front & rear diffs, but also works well in the gearbox (espesially older, worn units) as it has an addative to help the baulk rings to carry out their job of providing both smooth & crunch free gear changes.

You generally find that the specialist (competition spec) oils tend to need warming up & even then they only really work properly in the gear change dept when used in a gearbox that is in good condition.

All IMHO of course... Backed up with some experience for good measure.

mini vs scooby

Just that the guy at the garage said its a different oil for diff and gearbox. I wanted to go motul gear 300 75w/90 £16 a Lt, but wasnt sure if i needed a dfferent oil for gearbox. I will have a look into castal driveline, any idea the cost?

Thx for the info

PeeVee

iTrader: (1)

You can pick up Syntrax for around the £12 a Ltr mark, maybe even cheaper if you shop around a bit, although you need to watch the delivery costs.

A 75w90 oil is recommended for your car in both the rear diff & the gearbox (which contains the front diff)

The only classic cars that needed a different & specific oil for the rear diff are those that have had the standard (quiet) viscous limited slip diff removed & replaced with the (noisy & clunky) mechanical plate type diff, which is predominatly used for motorsport applications.

oilman

iTrader: (9)

The Syntrax is okay, very popular in Imprezas, but there's nothing special about it. If you want a better oil, the Motul Gear 300 is a much better option.

mini vs scooby

Do they do 5lt in motul Gear 300? that should cover diff & gear box shouldnt it?

oilman

iTrader: (9)

5L will be plenty, but it only comes in 1L bottles.

Cheers

Tim