Volvo Owners Club Forum - View Single Post - 240 General: - Unleaded fuel 1981 240 with a carburettor

john.wigley · Apr 1st, 2024, 20:54

Unleaded should be fine and cause no issues, 'busman'. I think back in the day Volvo advised fitting a second H.G. on the higher compression motors to lower the C.R., but you should be OK with the B21A engine. Although not essential, I think that I would use E5 where available, rather than E10, not so much for the higher octane but more for the lower ethanol. It's a tad more expensive, but you should recover that with increased MPG.

Regards, John.

Apr 1st, 2024, 20:54	#2
john.wigley VOC Member since 1986 Last Online: Today 18:18 Join Date: Jan 2007 Location: Leicestershire	Unleaded should be fine and cause no issues, 'busman'. I think back in the day Volvo advised fitting a second H.G. on the higher compression motors to lower the C.R., but you should be OK with the B21A engine. Although not essential, I think that I would use E5 where available, rather than E10, not so much for the higher octane but more for the lower ethanol. It's a tad more expensive, but you should recover that with increased MPG. Regards, John. __________________ Time flies like an arrow, fruit flies like a banana ..... Last edited by john.wigley; Apr 1st, 2024 at 21:45. Reason: Typo