Mi16 and unleaded?

[Clive (archive)]

Does anybody how what petrol is safe to use with a 16v Mi16 engine? Unleaded, super U/L or LRP (while I can still get some!!)?

If it makes any difference it is a 1990 without (as far as I know) a cat...

Thanks

 

[Ben Cowell]

"Clive" wrote:

Does anybody how what petrol is safe to use with a 16v Mi16 engine? Unleaded, super U/L or LRP (while I can still get some!!)?

If it makes any difference it is a 1990 without (as far as I know) a

cat...

Thanks

Normal unleaded should be OK, as most (all?) french cars built from 1990 are ok on unleaded.

I'd give super u/l or Optimax a try and see if performance or economy increases.

Ben

 

[Chris Barnard]

Unleaded will be OK, but AFAIK your Mi16 is a high-compression engine, and you might notice some power loss with normal unleaded (in reality I think this is only a few BHP)... Ideally, you should use super unleaded, or anything that's 98 RON. (I admit I'm going from memory here... is that right?) Normally, if you're running on LRP and you're going to switch to (normal) unleaded, you'd have to retard the ignition by a couple of degrees. However, the Mi16 has static ignition and I think it has a knock sensor. I should learn that you have changed to a different octane petrol and should automatically alter the ignition timing after a few miles and some hard acceleration.

Chris.

 

[G.T]

Hello,

unleaded, you'd have to retard the ignition by a couple of degrees. However, the Mi16 has static ignition and I think it has a knock sensor. I should

Yes, it has a Motronic, it will manage it by itself, after some miles, as you say.

 

[G.T]

Hello,

Do all mi16s have motronic? Thought it was only 2 litre versions, with the 1.9s still being k jet?

No, not only the 2L. The 1.9 also had a Motronic ECU, that was one of its specific features, compared to the 8v version (405SRi, for example). Later, all 2.0L XUs had a Motronic, as you said.