Yes I used it in a race car in Mexico when they had unleaded 85 or 87 pump gasoline. It worked very well on non ethanol fuel. The problem with modern pump fuel is the hydroscopic alcohol. In our stored cars, it absorbs more than the desired amount of water and ultimately changes the composition of the fuel and also attacks the older parts in the system as well (rubber and synthetic diaphragms hoses and gaskets). If you have or can find pure un-leded gas (without ethanol) it will work great and a second benefit is greater stabilization of the fuel. However; When you add up the cost of the gas and the additive there is a economic lacking and perhaps another hi-o option would be useful and more economical. That would be aviation gasoline at either 100 or 106 octane which is low led and formulated to last 20 years in the tank...!%? J D Jung Retromobilia.net ----- Original Message ----- From: "Jim Kelly" <gmman4@xxxxxxxxx> To: chrysler300@xxxxxxxxxxxxxxx Sent: Friday, May 11, 2012 10:14:35 AM Subject: [Chrysler300] octane boost has anybody used octane supreme from gregs speed shop in minnesota? it is a tetraethyl lead tel gas treatment/octane booster. i got this lead from a giy in kansas with a 66 dodge hemi. says it works great. any comments? thanks in advance. jim ps: speed shop website is www.octanesupreme.com [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/