Oil recommendations?
Thread Starter
|
Mountain Pass
Joined: Jun 2016
Posts: 168
Likes: 0
Oil recommendations?
I have 1974 internal balances 460 in my 77 f150. Bought engine used and put new top end on it, so the bottom end is still stock with 50,000 plus miles. Oil pressure when engine temp is 200 degrees is about 20psi down higgway and 5-10 psi idle. Taking into consideration this engine would classify as higher mileage worn engine what type of oil would be best?
I am currently running 10-30 I have researched this topic some but it seems to go in a million directions, but it does seem that a higher mileage engine should have a heavier weight? am in Oklahoma so summers are very hot and humid winters are not to bad.
I am currently running 10-30 I have researched this topic some but it seems to go in a million directions, but it does seem that a higher mileage engine should have a heavier weight? am in Oklahoma so summers are very hot and humid winters are not to bad.
Fleet Mechanic
Joined: Feb 2004
Posts: 1,508
Likes: 332
From: Arlington,Wa
And along with that...should seriously consider a zinc additive since todays oil you find at the McParts store doesn't have enough zinc to keep your cam and lifters from eating themselves. I have been using Shell Rotella 15W-40 for the past 10 yrs and haven't had any issues.
Cargo Master
Joined: Sep 2013
Posts: 3,256
Likes: 1,318
From: Pryor, OK
Motorcraft diesel oil 15w-40 with a Motorcraft FL-1A oil filter. The diesel oil has the zinc in it, plus in the winter you can run the 10w-30 diesel oil. Just my two cents. I buy oil from Walmart because it is the cheapest by far.
Mountain Pass
Joined: Aug 2002
Posts: 140
Likes: 5
From: Tucson
I've got about 12.5-15 psi at hot idle and about 35 psi at any RPM above 1500 RPM on my rebuilt 400 with about 100K miles on it now. I'm using Mobil1 15W-50 and it seems to like it. I had tried running Rotella T6 5W40, but I think it's just too thin for the Arizona heat.
Elder User
Joined: Apr 2018
Posts: 567
Likes: 3
X3 on Shell's Rotella 15-40 I use it in all my vehicles gas or diesel. Even though Rotella's zinc content has slowly been reduced over the years from 1500ppm to 1200ppm it's still approx. 400ppm more than most other oils on the store shelf.
In the 351m I just bought I used Valvoline 20-50 VR1 high zinc racing oil (it was on clearance 2.99 quart) oil pressure readings are 80psi @cold idle, 40psi @hot idle, 60psi @cruise. That's a significant increase over the old numbers which were 60/20/40.
So on an older high mileage motor I would have no problems running a 20-50 oil, or even a straight 50 oil if need be. If it's not a high zinc oil like VR1 just be sure to add a pint of zinc (ZDDP) additive.
In the 351m I just bought I used Valvoline 20-50 VR1 high zinc racing oil (it was on clearance 2.99 quart) oil pressure readings are 80psi @cold idle, 40psi @hot idle, 60psi @cruise. That's a significant increase over the old numbers which were 60/20/40.
So on an older high mileage motor I would have no problems running a 20-50 oil, or even a straight 50 oil if need be. If it's not a high zinc oil like VR1 just be sure to add a pint of zinc (ZDDP) additive.
Trending Topics
Lead Driver
Joined: Nov 2000
Posts: 6,624
Likes: 342
From: Albuquerque
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
02GrayPowerStroke
1999 - 2003 7.3L Power Stroke Diesel
15
Aug 27, 2008 12:47 PM
kidoo
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
15
Sep 30, 2007 05:37 PM