Bloody hell - a litre every 100 miles and it passes emissions? I'd use whatever is cheapest and change it every 3k or 1 year. Is it really specced for 5W oil? that's ever so light.
This, when iy was new 5w30 was maybe ok, try 10/40 instead. Change often and get cheap, not an engine the requires fancy oil. Whatever semi synthetic is cheapest at a parts factor. £12-20 a 5l bottle is prob right
Bloody hell - a litre every 100 miles and it passes emissions? I'd use whatever is cheapest and change it every 3k or 1 year. Is it really specced for 5W oil? that's ever so light.