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Hello All
Okay I know that alloy heads have valve seat inserts, however a 3.3 XF head, would this have hardened valve seats as standard so ULP can be used without any upper cylinder lubrication?
Regards
gts_hg
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what year is it?most of 86 and all 87 xf's had unleaded motors anyway
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Hey, what about the XE engines, cause I've been running mine on normal unleaded. Is that good? I thought all the alloy headed X-flo's were unleaded!
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3.3L was LOW compression and should run on unleaded. All alloy heads will have steel vavle seat inserts. Unleaded petrol was introduced in Australia from the beginning of 1986
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i thought that pre 87 engines should be run on LRP/Super, but aslo can be run on Ultimate-98 Octane, as long as it has Valvesaver n it?
thats the theory im running with in my Zk nehow.....
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