'94 f-150 with the good ol 300

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mobilaltima

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my cousin got an F-150 with the bulletproof 300 4.9 I6, very low miles for the year (113,000 miles). truck is rough though, no cat or muffler and had sugar put in the gas tank one time, and just overall beat up bad. runs excellent though. so due, to the low mileage, it would seem wise to use a top quality oil and filter, but my cousin is on a budget,and dont wanna go too expensive with the oil, and still relies on this truck day in and day out. so would it be best to use a 30 wt, im thinking 10W30 pennzoil and a napa gold filter, or a 40 wt? what do these ol 300's like best? i hear they run and run as long as they have something sloshing around in the crankcase lol.
 
The one I had loved Valvoline conventional. I now use it in everything though. I've seen enough high mileage engines that ran it only and they looked like new at 200k and I've seen a lot of Pennzoil and castrol engines that don't look bad but the Valvoline engines always looks better. Maybe its just my experience but ill stick with it.
 
Our old 96 I6 300 ran great on 10w40 either motorcraft or trop artic its whole life. Engine is still spotless and keeps on going. Now it gets 10w-30 since 10w-40 is harder to find and the 10w-30 is easier to find, doesn't get used in winter much and still have a bunch of 10w-30 so thats what it gets.
 
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IMO the best 6 cyl engine Ford ever made. Skip the 10W30, use 5W30, PYB comes to mind. Or if he wants to use a synthetic a 0W30 like M1 is good. Both are easy to get no jumping through hoops and frequently on sale. I've owned several Fords with those engines, in fact I still have one.
 
For south Louisiana temps, the 10w30 is fine, probably PYB or what's on sale (like the O'Reilly Mobil Super sale).
 
I saw one in an E350 shuttle bus with over 400,000 miles...since new, it got whatever bulk 15W-40 the company got the cheapest. And it's a 300 six...it should go 200K on just about anything slippery! laugh
 
In your climate, I'd do the HDEO, in any viscosity you find cheap. My personal default in older cars and OPE is 15W-40. My reasoning is that if a diesel can't kill it, no gasser can.
 
In La, that 15-40 HDEO is certainly a viable option - a good choice. But anybody's 5-30 should be great. Pennzoil yellow bottle is my choice.
 
Originally Posted By: demarpaint
IMO the best 6 cyl engine Ford ever made. Skip the 10W30, use 5W30, PYB comes to mind. Or if he wants to use a synthetic a 0W30 like M1 is good. Both are easy to get no jumping through hoops and frequently on sale. I've owned several Fords with those engines, in fact I still have one.
This.
 
My fiance's son has a 96 F150 with the 300 six and it is speced for 10W-30. We have been running Valvoline white bottle in it but it's ready for an oil change and we have some 10W-30 PYB to go back in. This engine has about 130,000 miles on it and runs pretty good. Wayne
 
Personally, in a 'warmer' climate like Louisiana, I'd run whatever 15W-40 HDEO I could find on sale for 5k and not worry about it.
 
Originally Posted By: demarpaint
IMO the best 6 cyl engine Ford ever made. Skip the 10W30, use 5W30, PYB comes to mind. Or if he wants to use a synthetic a 0W30 like M1 is good. Both are easy to get no jumping through hoops and frequently on sale. I've owned several Fords with those engines, in fact I still have one.
Agreed any 5W-30 PCMO that is from a major brand will work just fine. If the engine was maintained anything close to properly.
 
This motor was designed for 10W-30 and probably was never back-spec'ed, even to 5W-30. I wouldn't hesitate to use an HDEO anywhere that's South of the Mason-Dixon line... Except Antarctica? 0W-02 there... Always. Cheers!
 
Originally Posted By: Norm Olt
This motor was designed for 10W-30 and probably was never back-spec'ed, even to 5W-30. I wouldn't hesitate to use an HDEO anywhere that's South of the Mason-Dixon line... Except Antarctica? 0W-02 there... Always. Cheers!
There is absolutely no problem at all using a 5W30 in that engine, none at all. I've owned Fords powered with that engine since 1984, and still do. Most if not all of them were run on 5W30 w/o issue. Nothing wrong with 10W30 but I for one don't see any need for it in that engine. Opinions vary. Here's a cut and paste from the Mobil site as far as back spec goes. This is for an F-150 4.9L 1994. My 88 Still calls for 5W30. I guess Ford back spec'd the 94 which is news to me. If it were mine 5W30 would be in the sump. Although I might even give the 5W20 a shot, it worked well in my Aerostar when I used it. FROM MOBIL's WEBSITE: What's the right oil for my car? Our products in the viscosity right for your vehicle We've taken what you told us about your vehicle and driving conditions, and using an auto industry database, have determined our products in the viscosity recommended by your vehicle manufacturer. To learn more about a product, click its name. Current Vehicle: Year: 1994 Make: Ford Model: F-150 Engine Type: 6cyl. 4.9Liter Naturally Aspirated View printable Mobil 1 Extended Performance 5W-20 Mobil 1 Extended Performance 5W-20 is our most advanced, full synthetic motor oil, proven to protect for 15,000 miles between oil changes. Guaranteed. Mobil 1 Extended Performance reduces engine wear and oil breakdown, even during longer service intervals, to help extend engine life. Mobil 1 5W-20 Mobil 1 5W-20 is an advanced full synthetic motor oil that helps extend engine life by reducing engine wear and oil breakdown. Mobil 1 5W-20 provides outstanding performance under all operating conditions and meets or exceeds the warranty requirements where an API certified oil is specified. Mobil 1 0W-20 Advanced Fuel Economy Also consider Mobil 1 0W-20 Advanced Fuel Economy, an advanced full synthetic motor oil, for vehicles where a SAE 0W-20 or 5W-20 oil is recommended. Mobil 1 0W-20 Advanced Fuel Economy is engineered to deliver outstanding engine protection and a potential 2% fuel economy improvement based on a comparison versus those grades most commonly used. Actual fuel economy improvement is dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity. Mobil Super High Mileage 5W-20 Mobil Super High Mileage 5W-20 provides additional protection to help extend engine life in vehicles with over 75,000 miles by helping reduce oil consumption and prevent sludge build-up and engine wear. Mobil Super High Mileage 5W-20 contains seal conditioner to help protect higher mileage engines and prevent leaks. Mobil Super Synthetic 5W-20 Use Mobil Super Synthetic 5W-20, a full synthetic motor oil, to help extend engine life with high temperature protection in addition to the sludge and wear protection of the other Mobil Super products. Mobil Super Synthetic is suitable for Honda, Toyota and Ford vehicles that require 5W-20. Consider Mobil 1 5W-20 for even greater protection and performance. Mobil Super 5W-20 A premium conventional motor oil, Mobil Super 5W-20 helps extend engine life with outstanding protection to combat sludge and prevent engine wear. Special Filter Not Required For recommended filter for your vehicle click here This web site is updated monthly. Always consult your vehicle manufacturer's manual for information specific to your automobile.
 
Last one of those engines I had was my 59 Edsel Ranger(223 I6). Used mostly 10w-30 and 10w-40 in it and it still ran fine when sold last year. Good engine family. smile
 
Originally Posted By: mobilaltima
alright, i went with a napa proselect filter and some Castrol GTX 10W30, will go with ST 10W30 and a Purolator classic next time.
With GTX being so cheap at Wal-Mart, IMO i would stay with it instead going to the ST.
 
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