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Oil
https://slantsix.org/forum/viewtopic.php?t=35996		 Page 1 of 1
Author:  bud18007 [ Thu Jun 25, 2009 11:20 pm ]
Post subject:  Oil
I just had my slant six rebuilt and I'am about to drop it back into my 1982 D-150. This might be a dumb question but I don't know what kind of oil to use. I was putting 10w-30 in it before I had it rebuilt. Do I just use the same oil?
Author:  emsvitil [ Thu Jun 25, 2009 11:24 pm ]
Post subject: 
That'll work.

Non syn for breakin
Author:  ceej [ Thu Jun 25, 2009 11:43 pm ]
Post subject: 
Do you need break in instructions, or did your builder supply you with that information?

CJ
Author:  darrt wells [ Fri Jun 26, 2009 3:56 pm ]
Post subject: 
I use Shell Rotella T 15-40 for break in, and at every oil change. It has all the good stuff that you need with a solid lifter motor. The newer synthetics are okay AFTER break in, but to be safe i would use some oil additive that you can buy from comp cams
Author:  Rug_Trucker [ Sat Jun 27, 2009 9:35 am ]
Post subject: 
I would use 10-30 Rotella. 15-40 is OK for summer. 15-40 Valvoline diesel in my van makes noise in the TN winter until it warms up.


Too thick causes loss of MPG.

One thing for sure diesel lube will keep the insides clean!
Author:  Aggressive Ted [ Sat Jun 27, 2009 10:18 am ]
Post subject:  Engine break in
The machine shop that did my rebuild said they would not warranty the motor unless I used Kendal brand (diesel oil). It is very common up here and is similar to Rotella. So I followed their advice for the 20 minute 2,000 rpm break in procedure. After that I switched to 10-30 Valvoline for the next few months while the rings seated, then made the switch to 0-30W Mobile 1. Wow! what an oil!
The engine runs super quiet and gets incredibly fast oil pressure with a stock pump. Two seconds after start up I see 50 lbs. on the gauge. :)
Author:  Hudlow6678 [ Sat Jun 27, 2009 11:48 am ]
Post subject: 
Are you using that 0W-30 in the summer time and if so, how hot does it usually get where you are?

Right now I'm useing a 10W-30 in mine and after a pretty hard run on the freeway, I'll still be at 50psi of oil pressure at an idel. I'm at 60-65 crusin' down the road.

I'm thinking on going to a 5W-30 to take a little of the pressure off of things...
Author:  SlantSixDan [ Sat Jun 27, 2009 12:43 pm ]
Post subject: 
Quote:
I would use 10-30 Rotella. 15-40 is OK for summer. 15-40 Valvoline diesel in my van makes noise in the TN winter until it warms up
These recommendations are okeh for an engine in reasonable but moderately-worn condition. They are unjustifiably thick for a newly-rebuilt engine. Use 5w-30!
Author:  SlantSixDan [ Sat Jun 27, 2009 12:44 pm ]
Post subject:  Re: Engine break in
Quote:
The machine shop that did my rebuild said they would not warranty the motor unless I used Kendal brand (diesel oil).
That kind of requirement is illegal under the U.S. Magnuson-Moss Warranty Act unless the machine shop provides you with Kendall oil free of charge.
Author:  Aggressive Ted [ Sat Jun 27, 2009 2:20 pm ]
Post subject: 
Dan,
Quote:
That kind of requirement is illegal under the U.S. Magnuson-Moss Warranty Act unless the machine shop provides you with Kendall oil free of charge.
Yes, they filled the crank case and pre-lashed the valves for start up. I just had to add another quart once it was in the car.
Author:  Aggressive Ted [ Sat Jun 27, 2009 2:30 pm ]
Post subject: 
Hudlow6678,
Quote:
Are you using that 0W-30 in the summer time and if so, how hot does it usually get where you are?
Where we live against the foot hills it gets 85 to 95 quite often in the summer and occasionally a 100 for a week or so. In Seattle it might only get 75 or 80 degrees.

Dan suggested that I try 5-30W Mobil 1 in the summer which I have done but, there is something unique about the 0-30W Mobil 1. I am not sure what they do to the oil, but the engine really likes it year round. :shrug:
It runs cooler, quieter and has higher oil pressure quicker during the morning start ups and after heat soak. Plus the engine gets a little better mileage. I am thinking of just staying with the 0-30W Mobil 1. :D
Author:  SlantSixDan [ Sat Jun 27, 2009 3:35 pm ]
Post subject: 
No reason not to use 0W30 year round if your engine develops good oil pressure with it.
Author:  FrankRaso [ Sat Jun 27, 2009 4:03 pm ]
Post subject: 
The viscosity of 30-weight oils (0W-30, 5W-30, 10W-30, 30) is all in the same range (9.3 - 12.5 cSt) at operating temperature (100°C). Lower W-grades (cold viscosity rating) are thinner compared to higher W-grades when the engine is cold. Therefore, your engine should have about the same hot oil pressure no matter which 30-weight oil you use.

Generally, a 0W-30 oil will maintain its hot viscosity better than a 10W-30 or straight SAE 30 because it of its higher viscosity index.

Engine Oil Article
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