Thread: Premium unleaded?

Originally Posted by chazza

I would be very surprised if the 2L does not have hardened seats as the 1.6L does.

Check your workshop manual Scallops, it should tell you in there under the engine section/ replacing valve seats,

Cheers Charlie

Thanks Charles! I will. But adding diesel sounds like the go - pillaging from darned Puma - gotta be GOLD.

PS - can't find anything in the manual, can you? But if adding diesel to premium unleaded can't hurt - I'll do that.

PS - What do the (other) gurus think - are my valve seats likely to be hardened?

Adding diesel will bring the octane rating down, and can actually improve power output and fuel efficiency in a low compression engine.

Aaron.

Originally Posted by Aaron IIA

Adding diesel will bring the octane rating down, and can actually improve power output and fuel efficiency in a low compression engine.

Aaron.

Alright - half a cup of Grove fuel to be transferred into Matilda. Thanks for the help - everyone.

No matter what fuel you are using, always tune the engine to run on that specific fuel. Advance the timing until in knocks at full throttle, low revs top gear, and then retard it a degree or two.

Aaron.

All IOE Rover engines have hardened steel valve seats as far as I know. They do not however have a need or use for high octane fuel.

The problems with alcohol in the fuel may suggest that you need to use high octane unleaded, but I'm afraid that this will be only a short term solution as sooner or later alcohol will probably be mandated in all petrol.

John

Originally Posted by Lotz-A-Landies

For a cheap upper cylinder lubricant use diesel! About 1/2 cup or less in a tank of petrol.

II have been adding 1 jam jar full of diesel to a tank of fuel on my series one for the last 26 years.

I was advised to by an old mechanic many years ago, he said that it keeps every thing oily up-top. I did it mainly because rover engines were well known for experiencing valve seat recession and I wanted to be sure of overcoming this trite!
to a tankttt

Originally Posted by chazza

I would be very surprised if the 2L does not have hardened seats as the 1.6L does.


Cheers Charlie

I agree , all of these S1 motors came with hardened exh. seats from the factory - a standard fitting . Remember they were intended for use in a wide range of situations where fuel quality varied wildly e.g., Africa and Asia and god knows where. They will run happily on Power kero I would think.. after a warm up on petrol .

MIKE

The addative is not so much for the valve seats as it is for the valve stem, the biggest killer is running them too lean, Be careful adding the diesel as this can give you a false setup on the mixture. Get a good setup on clean fuel and then add the diesel but dont mess with the engine settings untill you've got another clean run of fuel in the tank and carby.

Also diesel will fraction out of petrol over time if you don't give it a stir up. As the diesel is heavier than the fuel it will sit in the bottom of the carby and the tank and make for some slightly interesting starting, bare this in mind if you have some intermittent starting troubles while you're running the diesel in the petrol.