Just new on here... can you help!?
My 03 STI prodrive is due a gearbox & diff oil change, its running Shell Helix 75w-90 but I've seen some Shell Spirax 75w-90 going cheap on a well known auction site. What do you think? cheers

 

Redline oil.

Try opie oils website.

http://www.opieoils.co.uk/vsearch.as...chTerm=Redline

 

Castrol Syntrax for me every time. You dont change the gear oil that often so pay the extra and get some decent stuff in there.

 

shell helix ultra is a good oil..but ive never heard of spirax.i would give it a miss bud.unless some one else on here has some imput.