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12-10-2012, 02:15 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: East Longmeadow MA
Posts: 34
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68 C20 gas question
How do I find out what type of gas my engine uses? I inherited a 68 C20 and I am not sure what gas it uses (Leaded or unleaded)... How do I find out?
If it DOES need leaded gas will running it with unleaded gas hurt the engine? The engine is a 250 streight six 4.1L Thanks for your help! Chris |
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12-10-2012, 02:36 PM
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#2 |
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Active Member
 Join Date: Oct 2002
Location: Ft. Myers, Fl
Posts: 1,716
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Re: 68 C20 gas question
If I remember correctly they stopped selling leaded gas around 1980, so if your truck has been on the road sense then...
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12-10-2012, 02:39 PM
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#3 |
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Registered User
Join Date: Apr 2007
Location: Foster Rhode Island
Posts: 1,176
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Re: 68 C20 gas question
Regular grade unleaded should run just fine.
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12-10-2012, 06:12 PM
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#4 |
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Registered User
Join Date: Oct 2011
Location: Algonac, MI 48001
Posts: 1,848
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Re: 68 C20 gas question
it should run fine on pump gas. im told you want hardened valve seats if you ever rebuild the engine. and no, i dont know what is involved with that...lol
__________________
Dave "... government even in its best state is but a necessary evil. Thomas Paine "It wasn't a lie, it was ineptitude with insufficient cover." Donald Draper (Mad Men) |
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12-10-2012, 07:02 PM
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#5 |
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Senior Member
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,976
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Re: 68 C20 gas question
Tetraethyl lead, which was formerly added to gasoline as an antiknock agent, had the added advantage that it acted as a lubricant for valves, particularly for the exhaust valves. As burb71 stated, it's been gone for a very long time. If your engine were going to be damaged by a lack of lead in the gas, it would have happened by now.
Regular gas will be fine. The biggest problem you will have is not from the lack of lead, but from the addition of ethanol to gasoline. Ethanol is not friendly to fuel system components that weren't designed for it. When you get to the point where you need to replace fuel system components, particularly a carb rebuild, make sure the parts are compatible with e10, which is 10% ethanol and is the gasoline you'll find almost everywhere. |
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12-10-2012, 07:41 PM
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#6 |
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Registered User
Join Date: May 2012
Location: Anton, Texas
Posts: 2,364
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Re: 68 C20 gas question
just fill her up and drive....have fun with it.
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12-10-2012, 08:35 PM
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#7 |
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Registered User
Join Date: Nov 2011
Location: East Longmeadow MA
Posts: 34
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Re: 68 C20 gas question
Thanks everyone! Looks like I was a little too worried about it.
 Chris |
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