castrol magnatec (bigport)
Penzoil Multi vis 20/50 in 4AFE, 4AC (mates car)
Penzoil Street machine 25/50 in new project revs motor..
have tried various semi synthetics 10/40, 15/50, 20/60, found mineral 25/50 to be the best comprimise because up here in the middle of the day it gets F$%#ING hot and oil turns to water thin..thats when engine failure occures....
have to say Penzoil is the best stuff i have used..
Penrite turns black after only a few hours use.. dunno why but it's quite smokey too.. even for such a thick oil... like 20/60..
wouldn't touch Castrol or anything thin or semi synthetic on a non rebuilt engine.., only on very fresh rebuilt 4AGE's, and low KM 20v's...
everything else i'd use a 20/50 or 25/50 if it's got a little higher in the km's...
So whats recommended for a 4ac with 200k on it using a bit of oil?
I use Castrol GTX in the 4ac
i'd hit it up with a bottle of stree machine 25/50, see if that stops the smoking, if not top up the oil a bit with a little Lucas Oil Stabilizer.. this shit is awsome!!! makes oil soo thick and gooooooey...my rings were completly stuffed in my old GZE, this gave it another 6mts driving! and didn't blow smoke..
i'm in brisbane, and i find that most other oils get tooooo thin on 40 degree days.. thats why i run a thicker oil...
Thanks mate. Its due for a change so i'll chuck some of that in it and see how it goes!
I use HPR 15 Semi Syn 15w/60. I also use a K&N Oil Filter
Cheers
i just went to supercheap on boxing day and bought half a dozen Z386's, my idea is if you change the oil and filter frequently enough the more chance you have of your engine lasting.. usually change the 86's oil every month or so.. cheap insurance if you ask me.. oil only has to go too thin for a few seconds to cause irreversible damage..
also with oil filters.. ryco or valvoline ones are perfectly fine.. most other brands are good also, as long as they have an anti-drain back valve you can use it fine..
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