So I know ford back sped'd the 4.9 ford to 5w20 motor oil, but there shouldn't be much of a difference between 0w20 and 5w20 should there? Reason I ask is I am using the mazda Idemitsu Ow20 in my mazda and I could use just one type of oil and keep it in my inventory. What do you think? would 0w20 be too thin for the old 4.9? I have been using 5w20 with good results.
F-150 4.9 Ow20 synthetic??
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Motor oil always thins out as it gets hotter. A 0W-20 doesn't mean it is thinner @ full temp than a 5W-20. They are both 20 weight oils.
In the case of amsoil, their 5W-20 is thinner than their 0w-20 @ full temp, but both are still 20 weights.
In the case of amsoil, their 5W-20 is thinner than their 0w-20 @ full temp, but both are still 20 weights.
Originally Posted By: bioburner
I would lean towards the 5w40 as it supposed to be a working vehicle and in a temperate part of the country, well was a bit of a cool front there for couple days
But he said 5-20 was giving him good results.
I would lean towards the 5w40 as it supposed to be a working vehicle and in a temperate part of the country, well was a bit of a cool front there for couple days
But he said 5-20 was giving him good results.
well when I say good results I mean it didnt leak all over the place or get consumed or have a wonderful UOA. I never did one. I will say that on rotella T6 it sounded like a quiet diesel when cold for some reason.
Originally Posted By: tig1
Originally Posted By: bioburner
I would lean towards the 5w40 as it supposed to be a working vehicle and in a temperate part of the country, well was a bit of a cool front there for couple days
But he said 5-20 was giving him good results.
But is not a oil recommended by any of the other vehicles. He wants a common denominator oil. I would just go to Walmart and get a 5 quart jug when the time comes and not worry about inventory.
Originally Posted By: bioburner
I would lean towards the 5w40 as it supposed to be a working vehicle and in a temperate part of the country, well was a bit of a cool front there for couple days
But he said 5-20 was giving him good results.
But is not a oil recommended by any of the other vehicles. He wants a common denominator oil. I would just go to Walmart and get a 5 quart jug when the time comes and not worry about inventory.
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I would use what it was originally specd for before the back spec.
original plus 20wt so I should be using a 50w?
That Ford 300 straight six was basically designed in the 50's and 60's. It's an OLD design. A 0W20, in Texas, is a TERRIBLE choice for that engine. If you want a common shared oil, use the same Rotella 5W40 as you use in your other car.
The 300 6 is nearly indestructible as any engine ever mass produced, 5w-20,0w-20, 5w30, 5w-40, 20w-60 and whatever else one can come up with will work fine.
If you're using 5w-20 and want to use 0w-20, or viceversa no problem as they're interchangable for your application.
If you're using 5w-20 and want to use 0w-20, or viceversa no problem as they're interchangable for your application.
I can tell you my 4.9 has had nothing but 10w-40 from new and with over 250k the engine has never been opened up and it uses 0 oil between 3-5k changes.
Unless your mains are worn out, 0/5w-20 will work fine. So will the T6.
Should be fine using the 0w20 in both vehicles
Originally Posted By: bubbatime
That Ford 300 straight six was basically designed in the 50's and 60's. It's an OLD design. A 0W20, in Texas, is a TERRIBLE choice for that engine. If you want a common shared oil, use the same Rotella 5W40 as you use in your other car.
I'll just go ahead and post my response again, since a bunch of banana throwing monkeys have inundated this thread with absolutely comical replies, ie recommending a 0W20 in this old engine design, in Texas.
OP, go buy some Maxlife 10W40 and give that old engine a proper viscosity, that it craves, and deserves.
That Ford 300 straight six was basically designed in the 50's and 60's. It's an OLD design. A 0W20, in Texas, is a TERRIBLE choice for that engine. If you want a common shared oil, use the same Rotella 5W40 as you use in your other car.
I'll just go ahead and post my response again, since a bunch of banana throwing monkeys have inundated this thread with absolutely comical replies, ie recommending a 0W20 in this old engine design, in Texas.
OP, go buy some Maxlife 10W40 and give that old engine a proper viscosity, that it craves, and deserves.
I would use Shell Rotella T6 5W-40, 5W-20 is a bit thin in texas for that old school 300 I6, even if they do indeed have a reputation for being extremely durable, some say it is the best engine Ford ever made.
Quote:
OP, go buy some Maxlife 10W40 and give that old engine a proper viscosity, that it craves, and deserves.
Vehicle is a 1995, not a 1975.... lol
OP, go buy some Maxlife 10W40 and give that old engine a proper viscosity, that it craves, and deserves.
Vehicle is a 1995, not a 1975.... lol
Triple_Se7en
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Wasn't 5W/10W-40 perfect for Texas heat in 1995? Still is today! Save the 0W/5W/20s for further north... a-lot further north / a-lot newer vehicle.
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Originally Posted By: simple_gifts
Quote:
OP, go buy some Maxlife 10W40 and give that old engine a proper viscosity, that it craves, and deserves.
Vehicle is a 1995, not a 1975.... lol
That engine family was built from 1964 to 1996. It's an OLD design.
Quote:
OP, go buy some Maxlife 10W40 and give that old engine a proper viscosity, that it craves, and deserves.
Vehicle is a 1995, not a 1975.... lol
That engine family was built from 1964 to 1996. It's an OLD design.
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