Hi Mike
Not so sure about the tyres but my S1 oil pressure always drops to the far left when the engine is hot and idling.Been like that for the 30,000 miles I have put on it !
regards

15 Weissman GT5
11 Aero8 SS
21 Q7
23 RR
24 Def'r 130
1960 XK150 DHC
1970 E-type
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