Hey Guys,
I'm formally known as Mini Mistress from the old forum.

Gots a question for you guys....

I'm having to convert MERLIN to unleaded fuel with the additive stuff, and he doesnt like it. he's backfiring and chugging like a lawn mower. Wondering what u guys are sticking in your tanks now days?

Thanks!

bp 98 ron unleaded with flashlube
flash lube also do a self adminestering thingamy lol
makka

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Anonymous moderation means the agro that is built up towards the mods isn't aimed at an individual (fewer "Makk" attacks). Less stress for mods means less moderator "retirements".

I am running my 1100 on regular unleaded with no additives and have been for about two years with no problems.
I do not drive it hard and most of the use is around town so it is not getting hard use.

When the valves recess into the head I will fit better valves and seats but untill then I will run regular unleaded.

I did retune the car for the different fuel so you may need to fiddle with the timing and the mixture.

I use 98 Premium (BP or Mobil) in my 1310, with Flashlube.
I know it works- I pulled the head for a look after 30,000 miles. Beeeautifull..

OTOH, my son's 1098 Clubbie stuffed the valve seats in 6 months after rebuild, running straight unleaded. I got pics too...

Straight unleaded is OK if you fit unleaded valve seats in, but it's cheaper to just add Flashlube. 1L does 1,000L of fuel and costs $ 16 retail.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

yeah im running normal unleaded and flashlube after using LRP and i reckon its starting/idling and running a lot smoother than it was....and i cant say ive had any problems with it (i tihnk i might even be using a little less fuel too )

I have unleaded seats in my van's head.

I use 98 RON BP Ultimate when I can get it, LRP when I can't, Premium as final choice. I cannot be bothered using flashlube/valvemaster.

BP LRP is 96 RON, same as Premium (not Ultimate). So if you don't have a cat converter, use LRP when possible and don't pay more for Premium. YOu can still add valvemaster if you really want to but it's not strictly necessary)

The ONLY difference between Premium and LRP is LRP has extra additivies to combat valve seat recession. I know this because I work for BP!

(BTW: Don't flame me, I don't work in Pricing!)

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Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2

Pic of modified 1098 head after running plain unleaded fuel for 6 months (after valve job). Check #2 exhaust seat....

OK it's been sitting in the shed a while so I know it's grubby...

Note it's been bronze welded between the cylinders... no it didn't leak!

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I have hardened valve seats in mine, and usually run BP premium with Flashlube. The flashlube definitely seems to help the engine run smoother(as much as the cam will allow it to run smooth). There are only one or two servo's up here, that have the Extra Premium stuff(optimax etc), and I cant be bothered driving across the other side of town for it.

I will suggest retarding the timing on the car a few degree's as a preventative measure against detonation(pinging, pinking whatever ya wanna call it). This is not always necessary, but may help your problem.

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"He's always been a dickhead, He always is a dickhead, He will always be a dickhead. So stop complaining when he acts like one."

Just to dig up an old topic:

Filled up MistyK for the first time the other day and had to wonder whether i was doing the right thing going with LRP. all you guys have some sorta mods but mine is a straight factory 1100 with only 14,000 miles on the clock...

SO.. LRP or BP 8000 with flashlub/valvemaster??

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The trouble with LRP is it varies so much.

When I used to use LRP, it filled the plugs, chambers and ex ports with brown crap, I don't get that running Premium 98 with Flashlube- it all stays clean..

A stocko 1098 should run fine on normal 91 unleaded with Flashlube, IMO. My son's one does, and it's modified.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

what exactly does flashlube do.. is it an octane replacement as well as a valve seat protector etc?

cos 91 ron is awful low.. what would happen if i ran optimax tyepe 98ron fuel with simlar additive? hehe avgas.. 110 ron..
p.s i meant mobil 8000 not bp 8000.. oooops..

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Flashlube is a lead replacement and upper cylinder lubricant, not an octane booster. It was originally developed for taxis running LPG which is also a `dry' fuel (ie no lubricating properties) and gave valve seat recession on pre- 1988 engines.

91 octane is all you need if C/R is 8.5 or so, like a stock 998 or 1098. But if it's modified at all use Premium.

I ran octane booster in Mobil 8000 last time on the track, I must say it was a waste of money. It ran better after the tank was empty and refilled with 98 octane Mobil and Flashlube.
BTW my C/R is 10.4:1, it likes 98...

<edit> some Flashlube info here-
http://www.brockautoparts.com.au/news.htm
http://www.flashlube.com.au/store/default.pl

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Question: can a car with lower CR still run on higher octanes? what happens if it does? For instance mine is stock 1100 (I think) and it runs well with 98ron. I think it goes pretty good...

Question2: How the heck do you tell what compression ratio your car is running? or is that a "work it out during rebuilding" thing?

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Lillee - 1969 Morris Mini K

Q1 you won't hurt it but you'll pay more for fuel. There's no more `power' in Premium, it's just more resistant to detonation or pinging. That's what the term `octane' means. You do need it if you run a high C/R, which will give more power..

Q2 It's a "work it out during rebuilding" thing...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Q1: Bugga

Q2: Bugga

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Lillee - 1969 Morris Mini K