timmy2take

iTrader: (7)

The engine is standard apart from a backbox and dump valve.

scooby546

iTrader: (1)

Hi, I have the same car and I'm using NGK PRF7B spark plugs (originally came with NGK PRF6B) which are running fine - check the gaps are 0.7mm before you install them; mine were already pre-set to this but its worth checking.

I'm using 15W50 on mine at present, but will probably change to 10W40 (once I run out of the existing stuff). Don't forget replacement oil filter and sump plug washer

timmy2take

iTrader: (7)

I know 7s are recommended on Tuned classics, but what about a standard sti?

scooby546

iTrader: (1)

Yeah, the only difference is the plug temperature; 7's are better for tuned engines as they cope better with heat but they will be fine on standard engines as well. At present mine's standard (ish) and it runs fine on 7's, so they should suit yours as well I reckon

Smurf2k

iTrader: (6)

I have pfr7bs on a heavily modded sti also run Motul 300v oil