Q. I currently have a 1980 VC Commodore and am running it on premium which someone said will work fine until it destroys my engine! Whats the best thing to do? - Troy, via email Pit Stop answers: Running a 1980 VC Commodore on premium unleaded is not a good move without using a lead replacement additive. You can buy this in single shot applications at service stations or buy it in larger 250-300ml bottles. The most cost effective way is to have a mechanic fit a flash lube kit which holds approximately one litre of lead replacement additive and this should do for about 10,000km.