• first 360 question :)

Posted: **11 Dec 2007 03:12 am**

Hi guys

I recently bought my first 360 (thanks Foggy and Chesh

) and have a really simple question.

It's a C reg with a 404 renix so would this therefore need 98 octane as it was originally designed to run on 4 star?

cheers!!

Shimon

Posted: **11 Dec 2007 10:11 am**

If you reply to my PM, I'll chip in

Posted: **11 Dec 2007 07:08 pm**

hello!

ah... did my reply not come through? I'll send another

Posted: **12 Dec 2007 12:33 am**

Posted: **12 Dec 2007 12:38 am**

My 85 has ran for 3 yrs on Morrisons unleaded without problem and I would hardly think that's a high grade fuel.

Before a road rally a while back treat it to a few tanks of Shell super unleaded only difference I noticed was in me wallet.

Posted: **12 Dec 2007 09:55 am**

Hi Shimon!

Good to see the GLE SE went to a good home

What's the compression ratio on your car?

foggyjames wrote:Ignore whether it's a B200K or B200E. The compression was lowered for all versions of the B200 from 10:1 to 9.2:1 in 1987 (I think).

10:1 cars need to run 97+ octane to avoid light pinging. That may be what you're experiencing. It'll not make much difference overnight, but the pre-ignition will nibble at your headgasket over time, and the extra heat won't be appriciated either.

EDIT: Those early low-comp figures could be specs for another market. Volvo made the ultra-low compression "camel piss spec" B17 (1.7 redblock) for sale in African markets, which at the time has some very poor quality petrol. Here, at least, they were all 10:1 up to 86/87.

http://www.volvo300mania.com/forum-uk/v ... php?t=4581

Tom

Posted: **12 Dec 2007 10:39 am**

I'd imagine it'll be the high compression 10:1