Inline 6 oil

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Mar 24, 2003 | 11:48 AM

darkenedknight

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Inline 6 oil

I have a 1990 F-150 300-I6 EFI with 114K miles on it. I was wondering what is the best brand and type of oil to run in this truck?

Mar 24, 2003 | 02:20 PM

rusty70f100

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Joined: Jan 2003

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From: Iowa

Inline 6 oil

You're gonna get a lot of opinions on this. So here goes mine: Mystik JT-8 10w30. It's SL / CI-4 rated, and I got a few cases for $0.89 / quart at the local Farm & Fleet. It's made by Citgo.

Really though, any SL rated 10w30 would be perfect, IMO. If you're going to be in extremely cold temps, go with a 5w30. If you're paranoid about it, go with Mobil 1. Change it every 3000 and you shouldn't have a problem.

Edit: 114k, thats just getting broke in for a Ford!!

Mar 26, 2003 | 12:59 AM

jrs_big_ford_f150

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Joined: Oct 2002

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From: Dededo, Guam

Inline 6 oil

I use Mobil 1 10w30 and a Mobil 1 Filter. I used to be a diehard Pennzoil and Fram guy. Not anymore. My Big 6 has over 120,000 miles on it, and since I have switched to Mobil 1, I have noticed that my rods and lifters do not knock and clatter on startup nearly as often. It is a very good oil and a well built filter IMO.

Mar 27, 2003 | 02:17 PM

couleeman

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From: Magrath

Inline 6 oil

I use Quakerstate 10w-30 4x4 (semi-synthetic). For the price difference between the semi and the conventional oil, why not.

Mar 28, 2003 | 07:37 PM

6 cyl boy

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Joined: Aug 2002

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From: Irvine

Inline 6 oil

I've had good luck with delo 15w-40. But I live in california so it's warmer most of the time.

Mar 29, 2003 | 11:01 AM

chuck641

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Joined: Mar 2003

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From: Villa Rica, GA

Inline 6 oil

i use mobil 1 10w30 i used it im my f150, my conquest, and my bronco, and my dad uses it in all his trucks. never had a problem

Mar 29, 2003 | 03:54 PM

Chas1234

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Joined: Dec 2002

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From: Quaker Hill ,CT U.S.A.

Inline 6 oil

Any 10/w30 is good but use a good quailty fiter like a motorcraft or purilator , your engine WON'T KNOCK with the motorcraft ..My '89 would knock with an other filter but not with the motorcraft filter . Atleast give it a try , besides it is what was orignainlly on the truck
Jon

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Apr 1, 2003 | 01:44 AM

hood

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Joined: Sep 2000

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From: Flat Rock, Michigan

Inline 6 oil

darkenedknight:

With over 209,000 miles on my unrebuilt 4.9 I have used a variety of motor oils. Shell, Mobil, Castrol, Quaker State, Pennsoil, and even the cheap Murray's house brand. But one thing i have done faithfully is to use Motorcraft oil filters FL-1A and change the oil and filter every 3K miles.

But then again I am talking about my 81 F-150 which has recently developed a rod knock. I can't complain about 22 years of dependable service. I still drive this tank around town.

I now use 20W50 to help quiet down this die-hard engine. I bought a new F-150 below and use 5W30 Mobil or Shell (whichever is on sale) with of course a Motorcraft oil filter.

I'd put 10W30 in your truck and use a Motorcraft oil filter and go 3k between changes.

-hooD