I just walked into my shop & ask for a new filter for a 1994 FTO GR/GX ect. He looks it up on his computer & grabs it off the shelf. Its a bosch.
I loads multiple filters for the same car & have been presented with different one's each time so I think they're mostly generic.
Oil is Castrol magnetic 10w40.
I would go 5w30 synthetic. I'm not a fan of the magnatec.
I did try it once.
Found the best for power+ smooth through the rev range with no "flat spots" was 5W30. I have castrol Edge at the moment but it's getting stupidly expensive so I'm gonna try the Nulon brand which is around $35 instead of now $65+ for the EDGE range.
It is a 10W30 though so we'll see what its like.
With Castrol magnatec I found it slaved the engine more due to it's thickness (possibly). If you want protction to the crank and cylenders/ bores etc I'd put in a bottle of Nulon E30 if it's available to you. It cost's a bit but has a long life (80,000km or so, does get effected by oil changes) It adds PTFE to the engine. PTFE's good for the gearbox too. Nluon G70. for gearboxes and transmissions. Makes a huge difference to the gearchanges. Manual or Auto.
They did test and drove the car (holden V8??) from Adelaide to Sydney??
with no oil. just the treatment added. Was still fine after!!!!.
I've just added the G70 treatment to my gearbow that I've just rebuilt.
Not an exaggeration to say there was a MASSIVE difference.
I'm not trying to promote these products by the way. Just what I've found to work.
I would definately try changing to the genuine filter. Wat did the generic cost??
Here the genuine filter (from Holden in my case) was only around $12.
It really made the difference with the engine lifter noises that were previously anoying me. (Still to put the E30 in but I have a bottle waiting)