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To gas or not to gas

Asked by Graham Studd

I WOULD like to convert my 100 series Toyota LandCruiser V8 to sequential vapour injection gas. Would it have any adverse effect on the engine, and if so, should I modify the heads and change the valves? Would an upper cylinder lubricant help? How often should I run it on petrol?

Answered by CarsGuide

6 Oct 2005 Graham Smith

NO THERE won't be any adverse effect on your engine, and with sequential vapour injection you won't notice any difference in performance. You can use an upper cylinder lubricant for a little extra protection as LPG is drier and therefore harsher on valves and valve seats than unleaded petrol, but it's a precaution rather than a necessity. Running the engine on petrol once a week will prevent the seals in the fuel system from drying out and hardening.

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