joshnosh

iTrader: (1)

right what dose everyone thinks better

decent fully synth every 5k or decent semi synth every 3k?

i ask because i can get decent semi synth from costco in 20l barrels

PhilWrx100

Got to go for fully synth every time. I would. Why every 5k? Do you do few miles?
Phil

360ste

iTrader: (1)

Fully syn every 3.5 k miles and possibly a filter change.

joshnosh

iTrader: (1)

i do about 12k a year so 5k is about twice a year for me

is it really worth changing it this often if im using really good oil?

thats gunna be expensive

DTVHSR

Subaru themselves recommend 3,750 miles intervals for oil and filter changes.
I'll be doing mine every 4k or 5k.

piehole1983

iTrader: (7)

The service book for my classic says 7500 miles.

dj219957

imo a cleaner semi oil is better than older fully synth oil. i use 10w40 semi in mine every 3k.

piehole1983

iTrader: (7)

Are particular brands important here too?

joshnosh

iTrader: (1)

depends on what quality your going for
any fully synth will generally be better than the best semi

when it gets to fully synth though you can spend loads. its hard to prove whats better than others though
people all have there personal preferences

surely if you change the filter that often its not gonna work that well?