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Old 08-01-2022, 10:08 PM   #1
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What Oil Are You Using In the Sunmer Heat?

I’m curious what Oil and Oil Filters everyone is using with the summers hot temperatures. See if anyone had some good results with certain brand/weight/additive/Filters or mixing oils.

1995 Winnebago Vectra M-33RQ

F53 460 V8 7.5l Fuel Injection 61,xxx Miles

I use 5QT Mobil FX2 5w-50 & 1QT Mobil 0w-30 Racing, Donaldson P169071 Oil Filter. The engine ever sounded better, smoother and quieter. I used 5w-20 before and it was noisy and even the heat off the dog house was greater.

Might go back to the Mann-Filter W 950/4 Oil Filter. It’s alittle larger than the Donaldson. Any suggestions with the use of the 5w-50? I’d rather more flow than filtration.
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Old 08-01-2022, 10:40 PM   #2
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You're not going to get flow with a 50 weight oil. It will give you more pressure, because the 50 wt properties will prevent fast flow at high temps. not sure why you are using that high weight oil?
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Old 08-01-2022, 10:43 PM   #3
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I'm using what the manufacturer recommends for my vehicle, call me strange.
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Old 08-02-2022, 12:08 AM   #4
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I looked at what Ford is recommending now and itís 5w-20Ö.are you using that in your big block? Over the weekend camping I was talking to other Motorhome Owners and they use 10w-30 or 5w-30 in their V10ís but when they had their older F53 with the 7.5l they were telling me how they used 15w-40, 15w-50 and 20w-50 In the summer months.

Iíve been using 5w-50 for a year now because of the amazing protection this has on engine wear and heat. The engine pulls 17,000lbs and wanted to give her the best. The VOA for the Mobil fx2 5w-50 is one of the best Iíve seen.
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Old 08-02-2022, 02:50 AM   #5
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It's not clear what an analysis from unused oil proves, nor am I aware of any common issue of oil-related failures among the enormous fleet of vehicles using 5W-20 or 5W-30. Absent an actual problem I'm not sure what you're trying to 'fix' by varying so far from what the manufacturer recommends.
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Old 08-02-2022, 04:51 AM   #6
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A 460 requires 5w30 or 10w30. 5w50 is just too thick. When I had my 02 V-10 Excursion I was running 5w30.
Yes Ford changed their recommendation, but the engine was designed for 5 or 10w30, so use that.
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Old 08-02-2022, 04:52 AM   #7
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I use the Ford recommended oil weight, 5W20, year round. The whole purpose of a multi weight oil is that you don't need to change weights as the season change. Lab reports have not indicated a problem with viscosity regardless of mileage. Engine temps have remained within normal operating range regardless of outside air temps, rolling weight of the coach or terrain I might be driving.

If you're happy using something else and believe you are increasing the performance or protecting the engine from premature wear good on you. The only down side I can see is may be to your maintenance budget if your choice in oil or filter is something a bit outside the more common consumer items that might cost less or what you time is worth working on the coach.
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Old 08-02-2022, 05:10 AM   #8
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|Ford constantly updates oil to the newest popular oils as specs update, they can work.they say.

The 460 is a flat tappet motor.. it has a cat but many early med or hd chassis did not.. The cats required a slightly less amount to zinc/phos in oil that protects the cam and other parts. valve stems etc..

In around 2008 , much of that protection was removed from modern oils.. as newer cats need clean burn..

SO I would not use a modern 5w-20 in motor that is based on older technology oils requiring the use of zinc etc.. The V10 motors and such started to evolve with new tech/metals/ clearances designed with the newer oils in mind..
The new 7.3 ford, is specific built to live on these 5w/20 all day..

IN all my 385 series , 370,429,460 motors we ran 20w50 conventional thru the 70,s and 80,s.. then the 15w40 diesel oils for years..
Now I use the 15w40 synthetics during high heat and heavy towing.. my fall or late summer oil change is a 5w-40 version as that seems to work well 80% of the times..
I had lost coolant once and had to keep going thru a construction zone, up hill for miles.. when i pulled over the oill was crackling in the motor,, That motor is still going with new owner, and 30k later at over 210k on it..

Extreme, far out chance but.... you sometimes puch the RV , mashed to floor and just run them,,,,
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Old 08-02-2022, 05:16 AM   #9
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This is the first I have heard of these light weight oils. When did the trucking industry move away from 15w40 fleet oil?
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Old 08-02-2022, 05:50 AM   #10
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Originally Posted by Dodge Guy View Post
When I had my 02 V-10 Excursion I was running 5w30.
Yes Ford changed their recommendation, but the engine was designed for 5 or 10w30, so use that.
Did Ford change their recommendations for the motors built on that notification date and all motors going forward, or did they change the recommendations to include the older motors?
I just changed mine yesterday using the manual recommendation of 5w-20, which is all that the motor has had since day it rolled off the assembly line. 103k miles later its still purring away issue free.

'06 V10
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Old 08-02-2022, 06:16 AM   #11
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I run plain old dino 10w-30 oil in my 93. For extreme heat a 5-40 synthetic will give you more protection. My engine manufacturer recommends 10w-30 , so that's what I run.
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Old 08-02-2022, 06:47 AM   #12
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Uh, you use the oil that Ford recommends!
My name is Peter, and I'm never going to grow up.
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Old 08-02-2022, 07:14 AM   #13
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Originally Posted by smiller View Post
I'm using what the manufacturer recommends for my vehicle, call me strange.

Yeah - I agree -->> manufacturers do know what they've tested works best {except for tire pressures it seems since "everyone" seems to think they have to follow a special formula even when armed with good fully-loaded four corner weight - LOL}
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Old 08-02-2022, 07:37 AM   #14
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Ford has a recommended oil for various temperatures. I use the heavier oil for our truck as we stay in the south and seldom see the lower temps. Accorcing to the Ford manual, 15W-40 is what I use year around.

Just go by the owner's manual and use the right MIL-spec oil.

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engine, heat, oil, oil filter

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