By Premium fuel - I assume you mean 95 or 98 octane fuel - why would you need that on a low compression engine? Higher Octane fuel is only needed for higher compression engines or those running extremely advanced ignition timing.
Like for the 4 cylinder engines, I would not have thought upper cylinder lubricant is needed but am not sure - John will know.
Garry
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
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