unleaded gasoline - Mustangsandmore Forums

Brought to you in part by:

.

Mustangsandmore Forums

'64 1/2 to '73 -- The Classic Mustang

unleaded gasoline

profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone!

next newest topic | next oldest topic

Author	Topic: unleaded gasoline
beachbum Gearhead Posts: 117 From: Florida Registered: Oct 2001	posted 12-02-2001 09:09 PM Have a question about unleaded gasoline. My 1968 Mustang with a 289 is original as far as I know with about 130,000 miles. When these engines were designed almost all gasoline was leaded with the exception of Amoco white gas. How will the valves and seats hold up without leaded gasoline? [This message has been edited by beachbum (edited 12-02-2001).] IP: Logged
bluestreek Gearhead Posts: 1060 From: Athens,GA Registered: Jul 2001	posted 12-02-2001 09:50 PM I have been using a set of standard heads now for 6 yrs on my 289 and have not seen or noticed any ill effects from unleaded fuel as of yet.. I discussed this with a head rebuilder awhile back and he said that he only recommends hardened seats for the larger displacement chryslers and chevys.. Take it for what it's worth.. IP: Logged
74merc Gearhead Posts: 733 From: Demopolis AL Registered: Jun 99	posted 12-11-2001 11:06 PM my cousin's 68 289 didn't last long... maybe 20K miles... he only had 38k on it when he got it... IP: Logged
SteveLaRiviere Administrator Posts: 30756 From: Saco, Maine Registered: May 99	posted 12-12-2001 11:47 AM I used to know a great auto machinist that passed away a few years ago, he had over 50 years in the business and his nickname was 'God' because he could do anything. I remember asking him this question and he told me when unleaded fuel came out everyone said the valve seats and valve faces would wear like crazy. Everyone was sure they'd have valve jobs night and day. But it never happened. The older engines seem to run fine on unleaded. He advised me to use hardened seats if I wanted to, but I could leave them out and not lose any sleep over it. I still use hardened seats on the exhaust when I get heads done, just to be safe. But if I had an old engine that was running fine, I'd be in no rush to change them. ------------------ '70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open '72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok '94 F-150 XL 5.8L/E4OD/3.55 Limited Slip '97 Probe GTS 2.5L DOHC Christmas shopping? Why not use the M&M Bookstore? IP: Logged

All times are ET (US)	next newest topic \| next oldest topic
Administrative Options: Close Topic \| Archive/Move \| Delete Topic
	Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2003, Steve LaRiviere. All Rights Reserved.

Ultimate Bulletin Board 5.47d

Amazon Honor System

[The M&M Gearhead Gear Store]

[Acronyms][Calendar][Chat][Classifieds] [Links] [Members' Pics] [Tech] [ Mustangsandmore.com Bookstore] [Advertise on Mustangsandmore.com] [Mustangsandmore.com T-Shirts]