Upper cylinder lube?

[Pedro_The_Swift]

A worthwhile investment on a sequential injected V8?
(starts on pulp till warm switchover, starts on pulp when hot.)

[bee utey]

Never seen a burnt valve on a LRV8 on LPG yet, they seem to be tough enough to manage without the extra lube.

[Mick_Marsh]

The alloy V8 already has the hardened valve seats.

Money for snake oil is best spent elsewhere.

[101RRS]

My 101 runs on LPG - when I bought it had an automatic valve saver system fitted which was a PITA as it leaked all the time. After research I found as Mick indicated that the valve seats are hardened anyway and like most alloy engines upper cylinder lubricant is not needed.

So i did away with the valve saver and not had any issues at all. Basically if an engine runs OK on modern ULP petrol it will run on LPG ok without issue.

Garry

[bee utey]

Basically if an engine runs OK on modern ULP petrol it will run on LPG ok without issue.

Not really true, there are plenty of modern ULP engines that fry valves on LPG. ULP still contains lubricants, just not lead. The early 2.7 litre twin cam Hilux engine was a particularly bad example. You had to buy ones specifically built for LPG or your valves were toast within 20K.