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Oil for Ford 300 6 Cylinder?


I'm going to change the oil & filter in a 45EM with a Ford 300ci straight 6. It was changed last in...

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  #1  
Old 04-12-2011, 11:20 AM
Radio Guy Radio Guy is offline
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Default Oil for Ford 300 6 Cylinder?

I'm going to change the oil & filter in a 45EM with a Ford 300ci straight 6. It was changed last in 2007 and they used Shell Rotella 15w-40. Ford truck forums seem to say 10w-30 is the viscosity to use.

The Rotella says it's for diesel engines, does that matter? Would I be better off with something like Castrol High Mileage 10w-30? It is supposed to have something in it to keep rubber seals in good shape and maybe it would start easier in cold weather with slightly thinner oil.

Does anyone know the oil capacity with a filter change? It looks like a Motorcraft FL1A or Fram TG-8A is the filter I need.

Thanks.
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  #2  
Old 04-12-2011, 11:56 AM
John W John W is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Your engine will start better in Michigan with the 10W30 oil. Personally, however, I would use 10W40 in case it is ever called upon to work hard for long periods. The rotella oil is made specifically for Diesel engines. It will work fine, but the cost difference is a consideration.

JW
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Old 04-12-2011, 12:50 PM
Billy J Shafer's Avatar
Billy J Shafer Billy J Shafer is online now
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Default Re: Oil for Ford 300 6 Cylinder?

If it helps. That engine is just a standard truck engine. So what ever oil is best for where you live will work. Filters can be PH8,FL1A,LF3313 all will work
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Old 04-12-2011, 01:36 PM
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Default Re: Oil for Ford 300 6 Cylinder?

I drove a 300 cid engine in a "77" ford F100 truck standerd shift, for 18 years to work & back. I used only 30wt hd engine oil (pennziol)./ Changed everyt3000 miles . It had 200 th on it when I sold it to a guy that still runs it hauling scrap.
So I say 30wt hd penzoil.
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Old 04-12-2011, 02:40 PM
71PAHighboy 71PAHighboy is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Make sure that whatever you use, ensure it has ZDDP... it is a wear-inhibitor that is needed by flat-tappet cams (like ours).

You can get a ZDDP additive, or make sure it is in the oil.

http://www.bradpennracing.com/Zinc.aspx

One of the manuals asctually has oil viscosity recommendations... I will see if I can find it and repost.

r/

eric

Sorry I missed this part...

The manual states 7 quarts when changing the filter...

Finally, I am not a fan of Fram Oil Filters (or K&N Air filters for that matter) and I would use a Motorcraft FL1A ... Walmart sells them for ~$3.50...

JMHO,

Eric
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Old 04-12-2011, 04:01 PM
BobRR BobRR is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Run 10w-30 you also need oil with a SL rating(kendall or valvoline racing oil have a SL) or the additive for flat tappet cam. Bob
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Old 04-12-2011, 05:38 PM
Radio Guy Radio Guy is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Thanks to all for the help. I'll get a couple Motorcraft FL1A filters and oil with the SL rating. I have a gallon of Castrol GTX 5w-30 here at our radio studios for adding to station vehicles. It has the SL rating. A Ford truck forum had posts about using oil with zinc in it? They said diesel oils like Rotella still have zinc are good for these older Ford straight 6's. I Never heard of this before, I only saw it on the web. The Onan service tech used the 15w-40 Shell Rotella, so I might go with that.
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Old 04-12-2011, 06:35 PM
HoMade HoMade is offline
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Default Re: Oil for Ford 300 6 Cylinder?

You had the right oil to begin with- Rotella 15w40. Stick with it. If you use it when the temp is regularly under about 20 degrees, maybe 10w30- otherwise stick with the Rotella. What is good for a modern engine is not good for your engine. It's an old design for which a "heavy duty engine oil" appropriate for diesels would work well.

BTW- you can get Rotella T for about $11.50 a gallon at Walmart....doubt you will find a really good oil for much cheaper. I use the Rotella 15w40 in my 30+ year old, air-cooled, parallel twin motorcycle.
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Old 04-12-2011, 11:36 PM
Motorhead Motorhead is offline
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Default Re: Oil for Ford 300 6 Cylinder?

I'd stick with the Rotella 15/40 also. If you think you are going to lose power in the winter (Ice storms, ect), then run the block heater.
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Old 04-13-2011, 01:11 AM
pegasuspinto pegasuspinto is offline
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Default Re: Oil for Ford 300 6 Cylinder?

TO help, Onan reccomends 20-40 for most temp ranges, (please don't ask me where to get 20-40, I never heard of it either), 10-40 down to -10, and 5-30 is the thinnest oil allowed for subartic conditions. 15-40 diesel grade, with the ZDDP is perfect. It's important to remember the cold start only lasts a few seconds, but within a couple minutes under load the set is getting pretty close to temps... Like was said, run the block heater when you know it might be needed....

Robert
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Old 04-13-2011, 08:51 AM
K D Redd K D Redd is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Keep the 15W-40 because it had the ZDDP your flat tappet lifters needs.

Kent
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Old 04-13-2011, 02:30 PM
BobRR BobRR is offline
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Default Re: Oil for Ford 300 6 Cylinder?

I believe the SL means it contains zinc anti wear additive? Bob
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Old 04-13-2011, 04:10 PM
Motorhead Motorhead is offline
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Default Re: Oil for Ford 300 6 Cylinder?

I worked at United Parcel Service from 1976-2006. The VERY BEST gas engine that powered a UPS truck was that FORD 300ci 6 cyl. Those things took a royal beating day in and day out.
I used to joke with people telling them, "A UPS truck only has TWO positions on the throttle.....Idle and WIDE OPEN".
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Old 04-13-2011, 05:15 PM
Lloyd H Lloyd H is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Our local UPS driver (now retired) was disappointed when he didn't get 300,000 miles on a 300 6
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Old 04-14-2011, 12:12 AM
Motorhead Motorhead is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Quote:
Originally Posted by Lloyd H View Post
Our local UPS driver (now retired) was disappointed when he didn't get 300,000 miles on a 300 6
They, UPS, didn't touch them unless they broke. They would special order the 300 engine from Ford so they could get aluminum timing gears instead of the quieter bakelite gears. We had one fuel injected Econoline go 454,000 mi on the original engine.
It would be good to know if ONAN had Ford put aluminum gears on the timing gears. I believe the engines are Ford Industrial engines.
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Old 04-14-2011, 10:38 AM
71PAHighboy 71PAHighboy is offline
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Default Re: Oil for Ford 300 6 Cylinder?

I can only answer for the 240 (C5PF) that was on my 30EK - it was the cast iron gearset.

If I remember correctly, they went 'metal only' on their industrial line of I-6 engines.

HTH,


Eric
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Old 04-15-2011, 11:06 AM
71PAHighboy 71PAHighboy is offline
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Default Re: Oil for Ford 300 6 Cylinder?

Here is the chart I alluded to earlier. This is for the EK-EM:




Hope that answers your questions.



Regards,

Eric
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