Diesel V8 - or straight six

[Kevin H]

Originally Posted by Janne

Here we have the US style petrol, and I thought I use a 50/50 mix between the Higher Octane and the Lower octane.
What do you recommend?

What is "US style petrol"?

I don't see much point in mixing lower octane (91 RON?) petrol with higher octane (98 RON?), surely you may as well just use one or the other.

I use 98 RON petrol in my 411 S5 but since the engine was rebuilt it has a higher CR. The original Chrysler V8's had a relatively low compression ratio so 91/92 RON petrol should suffice.

The 400 CID engines used in the 411 S4 & S5 actually have a lower CR than the 383s in the earlier 411s.

If you don't drive it very hard then you probably don't need to worry about VSR (valve seat recession), but you could always put in an additive to guard against that.

That said, if the engine number in your car (411 S5?) has a "J" series number (or later) it will have hardened valve seats anyway.

As for the metric vs imperial argument, given that the metric users on this site far outnumber the US Imperial users, I suggest we use litres from now on when discussion fuel prices. Then Lou can use the calculator on his cell phone instead of everyone else

[Janne]

As my engine has been restored and upgraded, I guess I will need to use the highest Octane.
Sometimes we get good quality fuels here, sometimes bad. All fuel is imported from South America (cheaper I think). The Diesel oil here is disgusting.

I think the highest here is 96, but not sure (wife does the refuelling on our cars except the Diesel Defender).

[browning l]

Originally Posted by Kevin H

As for the metric vs imperial argument, given that the metric users on this site far outnumber the US Imperial users, I suggest we use litres from now on when discussion fuel prices. Then Lou can use the calculator on his cell phone instead of everyone else

I'm happy to use my calculator, thanks.

What's a "US Imperial user?"

[Janne]

A US citizen that thinks the US has an empire....

Not sure either what the US non-metric measurements are called.
The British ones are called Imperial.
US Insular?

[Kevin H]

Originally Posted by browning l

What's a "US Imperial user?"

I meant people who use the US version of the Imperial weights and measures system.

Perhaps I should have said users of the "United States customary units".

[Thor]

Don't forget that USA octanes are different from European Octanes. European Octanes are Reaearch Octane Number (RON) and USA Octanes are an average of RON and Motor Octane Number (MON) and are consequently about 5 points lower. So 91 Octane USA Gasoline is about the same as 96 Octane UK Petrol. I think what we generally called 'Unleaded' in UK is like 87 or 88 Octane in USA.

USA Gallons are only 3.79 litre, compared to Imperial Gallons at 4.55 litres.

Do Americans ever talk of pints (other than when visting a pub in UK) ?

Thor

[browning l]

Originally Posted by Thor

Don't forget that USA octanes are different from European Octanes. European Octanes are Reaearch Octane Number (RON) and USA Octanes are an average of RON and Motor Octane Number (MON) and are consequently about 5 points lower. So 91 Octane USA Gasoline is about the same as 96 Octane UK Petrol. I think what we generally called 'Unleaded' in UK is like 87 or 88 Octane in USA.

USA Gallons are only 3.79 litre, compared to Imperial Gallons at 4.55 litres.

Do Americans ever talk of pints (other than when visting a pub in UK) ?

Thor

Sure. "pint" is commonly used here. And, it doesn't mean like a "pint" on a compass, the way it does in OZ.

Probably it's most common usage now is a pint of whiskey; less common now is a pint of cream, or milk. Few markets here offer milk in sizes smaller than a quart, but cream, whipping cream, and "Half-and-half" - use your imagination - is most often bought in pints.

[GREG]

Well I had a "few " Pints of Guinness, and at £3.50 / pint it costs more than a gallon of USA petrol !

I will consider drinking Diesel from now on -- pink diesel for the wife

[browning l]

Whiskies all used to be sold here in fifths, pints and half-pints. They still offer the latter two.

Now it's liter and half-liter; many of the producers are foreign, i.e., Seagram

Who cares?

I know, it's off topic...so, take it back.

[browning l]

Originally Posted by Kevin H

I meant people who use the US version of the Imperial weights and measures system.

Perhaps I should have said users of the "United States customary units".

{;>), since your icons options isn't working.