PLZ818 Posted August 22, 2013 Share #1 Posted August 22, 2013 So since I'm a Gen Y person leaded fuel was before my time and I'm in need of some info for my 74 sedan can I put normal 98 in it or do I have to run lead additive ? Link to comment Share on other sites More sharing options...
EuroDat Posted August 22, 2013 Share #2 Posted August 22, 2013 Back in the good old days your engine was fitted with silicon/bronze valve seats which are not suitable for unleaded fuel. You will burn the valves and seats using unleaded for prolong periods without a lead additive. I think Nissan changed to steel seats in Australia around the time the 280ZX came out, but I think that was more to simplify production. Australia didnt change to unleaded until 1985.The 98 is your best choice plus a lead additive or rebuild the head with steel seats which translates to a lot of lead additive.BTW Premium leaded was around 97 octane. GTHO's, RT chargers and XU1's loved the stuff. Thats my Gen...Chas Link to comment Share on other sites More sharing options...
Mastadd240K Posted August 22, 2013 Share #3 Posted August 22, 2013 Ran E10 In my 240k for about 3 years will no issues, but always intended to replace the engine Link to comment Share on other sites More sharing options...
PLZ818 Posted August 23, 2013 Author Share #4 Posted August 23, 2013 Stocking up on additive then for my road trip Link to comment Share on other sites More sharing options...
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