max miles per gallon?

1976BOAT · Post by **1976BOAT** » Mon Nov 15, 2010 11:14 pm

what is the best mileage you can get with a 460ci? the highest i have ever gotten is 14 mpg with 89 octane and mavel mystery oil fuel additve. has anyone topped that?

jsanford · Post by **jsanford** » Tue Nov 16, 2010 12:25 am

I averaged 16 mpg on the 800 mile round trip from Sacramento to Ventura and back for the WNM last May. I put nothing but 91 octane super unleaded in it.

Jeremy

kellyz · Post by **kellyz** » Tue Nov 16, 2010 2:59 pm

I have owned two 1977's with 460. The first one my highest was 19mpg highway. That was when it was approximately 8 years old. 13 years later when it finally rusted to pieces, I was averaging 16mpg highway.

My second and current car gets 10 in town and 13 highway. Not so good.

Both on unleaded 87 gas. No other additives.

CurtC · Post by **CurtC** » Wed Nov 17, 2010 9:40 pm

I can get about 16.5-17.0 mpg with my 76 Mark IV. This is with 91 octane gas containing at least 10% ethanol. If I could get ethanol free gas here in Colorado (which I can't this time of the year) I would expect to see 18.5 - 19 mpg, maybe more.

Curt

Chris Ingram · Post by **Chris Ingram** » Thu Nov 18, 2010 7:38 am

I just got a hair under 15mpg on a return trip from Boston (to the Catskills) last weekend. Regular gas in a 1977 Lincoln Continental (with the Town Car option package

)...

mwmwall · Post by **mwmwall** » Thu Nov 18, 2010 10:42 am

Averaged around 18 mpg from New York (place of purchase) to Chicago this summer. 1976 Mark IV Cartier with an alleged 30K on the odometer. The mpg surprised the heck out of me. Didn't use any oil either.

Mark

Dermot · Post by **Dermot** » Fri Nov 19, 2010 3:10 am

1976BOAT wrote:what is the best mileage you can get with a 460ci? the highest i have ever gotten is 14 mpg with 89 octane and mavel mystery oil fuel additve. has anyone topped that?

Just a note - my 1976 Price Book shows an EPA of 12/16 for 460 Lincolns and Mercurys and 13/17 for those with 400s.

1976BOAT · Post by **1976BOAT** » Fri Nov 19, 2010 4:21 am

Dermot wrote:
1976BOAT wrote:what is the best mileage you can get with a 460ci? the highest i have ever gotten is 14 mpg with 89 octane and mavel mystery oil fuel additve. has anyone topped that?
Just a note - my 1976 Price Book shows an EPA of 12/16 for 460 Lincolns and Mercurys and 13/17 for those with 400s.

hmm i would guess high mileage will hurt gas mileage, i got 198k on my 460ci and i am getting 8/10ish mpgs thats why i was shocked at 14

Dermot · Post by **Dermot** » Fri Nov 19, 2010 4:29 am

If you maintain your car it should not be noticeably different from when it was just run in.

Dermot · Post by **Dermot** » Fri Nov 19, 2010 9:11 am

1976 L-M Price Book - Pages 4-5.pdf: 1976 Lincoln-Mercury Fuel Economy Label Values - Federal; (538.65 KiB) Downloaded 146 times

Post by **Dan Szwarc** » Fri Nov 19, 2010 4:32 pm

12-16MPG baby!

TonyC · Post by **TonyC** » Sat Nov 20, 2010 11:46 pm

Frankenstein doesn't have that engine, but I have to throw this in anyway: net average mpg of 14, on 87 octane, with no additives. And a 462 is supposed to deliver no better than 12 on a good day with gasohol-free premium!

Yeah, baby!

1976BOAT · Post by **1976BOAT** » Tue Nov 23, 2010 10:15 pm

GAS MILEAGE QUESTION: if i put a 2 bbl carb on my lincoln in places of the 4 bbl will that improve my gas mileage?

Highlander64 · Post by **Highlander64** » Tue Nov 23, 2010 11:08 pm

1976BOAT wrote:GAS MILEAGE QUESTION: if i put a 2 bbl carb on my lincoln in places of the 4 bbl will that improve my gas mileage?

Possibly but not necessarily.

Dermot · Post by **Dermot** » Wed Nov 24, 2010 7:01 am

Highlander64 wrote:
1976BOAT wrote:GAS MILEAGE QUESTION: if i put a 2 bbl carb on my lincoln in places of the 4 bbl will that improve my gas mileage?
Possibly but not necessarily.

Manifolds and other internals for 2 and 4-barrel engines differed substantially!
Also, if reducing consumption is a priority, why not just drive with less use of WOT???? The secondaries come on with wide throttle opening. This way, when you NEED giddy-up'n'go, its there.

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