Unleaded?

[Millar]

How can i check if my 82' 320/6 has been converted to run on unleaded?

[murran]

it'll be fine, bmw's already had harded valve seats along time before other manufacterers......... if you had a 1980 mg metro it'd be a different story.

[Millar]

happy days, it'll be kept running on morrisons finest then haha. lets here the story then?

[pjksutherland]

Wait a minute - does that mean I can run my 323i on bog standard unleaded without the Castrol valvemaster additive I keep buying at £15.00 per bottle??

[Jason_323i]

Yeah, any alloy head car already has hardened steel valve seats. May just need to swing the dizzy a bit to alter the timming (minimal)

Jason

[e21-Mark]

Wait a minute - does that mean I can run my 323i on bog standard unleaded without the Castrol valvemaster additive I keep buying at £15.00 per bottle??

Yes, but use superunleaded. 2002's don't need additive either. They've run unleaded in Germany for donkeys years.

[Silver Surfer]

What running normal unleaded cause any issues?

[e21-Mark]

Might get a bit of pinking with regular.

[murran]

maybe retard the timing 2-5 degrees? to be safe.

[Silver Surfer]

Good point. Prob better to run super anyway just never really thought of it.

[Rushfan1]

I always run on premium fuel as I find it prevents the knocking. Shell V Power is wondeful stuff.

[mcjjordan]

back in the 90s i ran both 323 and 320 on unleaded and it burnt the valves out in both
better top be safe than sorry, id be using the addative anyway

[polov8]

It's more likely the car was running lean and/or the ignition was too advanced, it's not like a 320 or 323 is a highly strung powerhouse.

[Jeroen]

That would be my guess as well. After running several K kms on leaded in the 1980's even the older engines have no issues running on unleaded.