Was suggested not to use 5W-20 for my V8 anymore
10-08-2013, 04:22 PM
#1
Senior Member
Thread Starter
Was suggested not to use 5W-20 for my V8 anymore
Hey yall,
A few weeks ago, I finally got my 2005 F150 truck back. It took a long while, but I thank God I have gotten it back. The engine needed to be rebuilt.
The engine runs really quiet, even quieter than when I first bought it.
They gave me a 3-year 100,000 mile warranty to go with it. Which is almost like a new truck.
I was talking to their shop foreman. He gave me specific instructions so that I would not void the warranty:
1. Change oil after only 500 miles.
2. After oil change, change the oil after 1500 miles.
3. After oil change, change the oil after 3000 miles.
4. Continue changing oil after 3000 miles.
He also informed me that '5W-20' is not a good oil to use on V8s (especially high mileage ones).
5W-20 is too light for most V8s and they burn much quicker, and don't lubricate well.
He told Castrol 50 or 60 is what he recommends.
I told him 5W-20 is what Ford's manual recommended, but he stood firmly on his 50-60 recommendation.
Any one got any comments and input?
A few weeks ago, I finally got my 2005 F150 truck back. It took a long while, but I thank God I have gotten it back. The engine needed to be rebuilt.
The engine runs really quiet, even quieter than when I first bought it.
They gave me a 3-year 100,000 mile warranty to go with it. Which is almost like a new truck.
I was talking to their shop foreman. He gave me specific instructions so that I would not void the warranty:
1. Change oil after only 500 miles.
2. After oil change, change the oil after 1500 miles.
3. After oil change, change the oil after 3000 miles.
4. Continue changing oil after 3000 miles.
He also informed me that '5W-20' is not a good oil to use on V8s (especially high mileage ones).
5W-20 is too light for most V8s and they burn much quicker, and don't lubricate well.
He told Castrol 50 or 60 is what he recommends.
I told him 5W-20 is what Ford's manual recommended, but he stood firmly on his 50-60 recommendation.
Any one got any comments and input?
10-08-2013, 05:09 PM
#2
If the engine was just rebuilt it is no longer a "high mileage engine" disregard what he said and use the manual recommended weight oil, if the engine was rebuilt to spec it should be just like new. I would be worried if they actually rebuilt it or just patched it back together and are disguising the rest by telling you to use thicker oil. Something don't smell right that's for sure.
He must be one of those guys that think you need thicker oil in summer and lighter in winter and that type of thinking went away in the 80's due to technology and tighter tolerances in today's engines.
.
He must be one of those guys that think you need thicker oil in summer and lighter in winter and that type of thinking went away in the 80's due to technology and tighter tolerances in today's engines.
.
Last edited by RLXXI; 10-08-2013 at 05:15 PM.
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adanvjr (10-09-2013)
10-08-2013, 06:28 PM
#3
Senior Member
Thread Starter
If the engine was just rebuilt it is no longer a "high mileage engine" disregard what he said and use the manual recommended weight oil, if the engine was rebuilt to spec it should be just like new. I would be worried if they actually rebuilt it or just patched it back together and are disguising the rest by telling you to use thicker oil. Something don't smell right that's for sure.
He must be one of those guys that think you need thicker oil in summer and lighter in winter and that type of thinking went away in the 80's due to technology and tighter tolerances in today's engines.
.
He must be one of those guys that think you need thicker oil in summer and lighter in winter and that type of thinking went away in the 80's due to technology and tighter tolerances in today's engines.
.
Well, these guys are highly reputable and been in business since the 1940s.
If I switch to '50' weight oil, do I risk causing damage?
10-08-2013, 07:23 PM
#4
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adanvjr (10-09-2013)
10-08-2013, 08:37 PM
#5
Senior Member
50W oil sounds crazy. With a 3 year 100K mile warranty I'd let them do the oil changes. 5-20W is Ford's recommendation but they're not the ones who will warranty the motor. If you use 5-20w and loose your warranty you didn't gain anything. Ask about using synthetic oil.
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adanvjr (10-09-2013)
10-08-2013, 08:53 PM
#6
Senior Member
If this guy has been in business since the 40's he is still living in the 40's 50wtoil is for Harleys, airplanes and old loose noisy motors you are trying to quiet down long enough to sell or trade it. use the ford recommended oil if the engine was rebuilt to specks 50wt oil will screw it up in no time.
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adanvjr (10-09-2013)
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10-13-2013, 09:11 PM
#8
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I own a Lube business and can tell you that is you use 50 or 60 weight oil, you will spin your bearings. Follow his schedule for new motor oil change break in, but DO NOT use his oil lubrication as to oil weight. When you need to worry about high mileage again, use a high mileage full or part synthetic oil. I recommend Castrol products for oils and Prestone for most other applications.
10-16-2013, 01:41 PM
#9
I agree, he's probably still living in the 40's. Likely still thinks synthetic oil is a bad idea.
I have a '04 V6 Mustang with 183K on it. Have used Mobil 1 5w20 from the get go.
No problems. Peek in the oil filler hole, inside's like new. Use it in my 2010 F-150
4.6L as well.
Break it in & go with full synthetic. JMHO & experience.
I have a '04 V6 Mustang with 183K on it. Have used Mobil 1 5w20 from the get go.
No problems. Peek in the oil filler hole, inside's like new. Use it in my 2010 F-150
4.6L as well.
Break it in & go with full synthetic. JMHO & experience.
10-24-2013, 10:02 PM
#10
2013 Tuxedo Black Member
