Did you keep 5w-20 in a 200k mile

[Y_K]

Originally Posted By: Jarlaxle
A local guy runs 5w20 in a Ford V10...525,000 miles as of last week. Its an F550 repo truck.

This is great news. Do you know the history on this one? Was it fed a 20 oil all of its life?
I am using 30 weights, as I am waiting for a long mileage use of 20 oils empirical success. Every time I put a 20 oil in my v8 modular engines the knock racket is getting me after 600 miles max. I drive a lot and can hear every sneeze the car makes immediately. Cabbies here still use 10w30 to 20W-50 after 200k on the fords, progressively going up with mileage and consumption.

 

[DragRace]

Yes, Yes and Yes,nothing wrong with 5w20 oil,period.

We've used 5w20 and 5w30 in the Crown Vic,nothing any different with either weights of oil. It now has 235,000 miles on the car.

 

[CROWNVIC4LIFE]

On my 99 Grand Marquis I ran 5w30 Motorcraft Dino oil for the first 75K miles..Ford back specked it to 5w20 around 2001.. The Ford dealer was doing all the service on the car..I ran the 5w20 Motorcraft Blend till 300K miles until Hurricane Wilma totaled it out on me..

When I used 5w30 my 99 Grand Marquis I would be down almost a quart by 5K miles..On the 5w20 Motorcaft Blend it had zero consumption at 5K miles.

My friends kid recently bought a former owner operated taxi that was originally a patrol car for the first 120K miles..It has close to 300K miles on it..The cab driver used only 5w20 Motorcraft Full Synthetic from the dealer and sometimes 5w20 Mobil 1 at Mobil 1 Express..The kid is going to continue to use the 5w20..According to service records the police agency had Ford do all the service as they did not have fleet service and used 5w20 Full Synthetic Motorcraft.

BTW the car runs just fine.

 

[toneydoc]

I am with you Lexus114 use a good quality 5w20 or 5w30 or close to that, change it either with manual rec or regularly, and the motor will love you for a long time.

 

[GMFan]

As some have mentioned there are plenty of Ford Crown Vics that spec 5w20. I've been in plenty NYC taxi cab Crown Vics with 300-400k miles. Whether they actually use 5w20 is unknown. From what I've heard a lot of NYC taxis get free oil because oil companies pay them to test their oils in the taxis since they rack up mileage so fast.

 

[mechtech2]

Originally Posted By: steve20

Many police and cab companies that use Crown Vics have put 200-400K using 5-20 oils.

That is pure speculation on your part, so I'll add some speculation of my own: just as many PDs and cab companies have run 5-30 and 10-30 for 200-400K miles and their engines are fine as well


This is not speculation - and certainly not PURE speculation! Performance like this has been reliably reported over the years.

 

[CROWNVIC4LIFE]

Originally Posted By: mechtech2
Originally Posted By: steve20

Many police and cab companies that use Crown Vics have put 200-400K using 5-20 oils.

That is pure speculation on your part, so I'll add some speculation of my own: just as many PDs and cab companies have run 5-30 and 10-30 for 200-400K miles and their engines are fine as well


This is not speculation - and certainly not PURE speculation! Performance like this has been reliably reported over the years.


Yes tig1 and mechtech2 are definitely correct..I have been in a ton of service cars down here in Miami and I always ask the drivers what oil they use..99% of the time it is 5w20..Some of these cars have 400K miles on them.

 

[aquariuscsm]

Originally Posted By: Tech_Ed
But anyway - for me - thumbs up on the Motorcraft 5w-20 syn blend. (I use the 10w30 in my Nissan Z32 NA).


Hey there fellow Z32 owner! How long have you had it? What oil have you used throughout it`s life?

 

[modularv8]

Originally Posted By: steve20

Many police and cab companies that use Crown Vics have put 200-400K using 5-20 oils.

That is pure speculation on your part, so I'll add some speculation of my own: just as many PDs and cab companies have run 5-30 and 10-30 for 200-400K miles and their engines are fine as well


Well, it isn't speculation. Police/cab fleets achieve over 300k miles solely on 5w20 (conventional), at least on the Ford modular engine.

How Cabbies get over 300k from CVPI

 

[TFB1]

From the above linked article...

Quote:
The engine oil is then changed every 3000 miles or every two weeks.


At that change cycle 5w-20 is no doubt fine, apparently they don't trust it to go farther and frankly I would not either...

 

[Garak]

Originally Posted By: TFB1
At that change cycle 5w-20 is no doubt fine, apparently they don't trust it to go farther and frankly I would not either...


When I maintained a cab fleet in the 1980s, it was with 10w30 conventional (which was considered thin at the time) for 6,000 mile OCIs. If I were doing it now with 5w-20 SN/GF-5, I'd probably go longer than 3,000 miles.

 

[DrDusty86]

My Escort Zx2 has 205k on it. has had 20k miles of RP 5w20. Before that it was 5w30 RP. I rev it to 7k RPMs every time I drive it. My Motor uses NO oil between changes.
DR

 

[modularv8]

Originally Posted By: TFB1
From the above linked article...

Quote:
The engine oil is then changed every 3000 miles or every two weeks.


At that change cycle 5w-20 is no doubt fine, apparently they don't trust it to go farther and frankly I would not either...


According to the article, fleet managers follow manufacturer recommendations. 3000 mile oci is the severe service interval recommeded by Ford for these vehicles, otherwise, it is 5k miles.

 

[tig1]

Originally Posted By: TFB1
From the above linked article...

Quote:
The engine oil is then changed every 3000 miles or every two weeks.


At that change cycle 5w-20 is no doubt fine, apparently they don't trust it to go farther and frankly I would not either...


Now there's spectulation. What about 20wt oils that require it to be changed more often that 30-40Wt. As you may know I do 10K OCIs with 20wt with no problems.

 

[tig1]

Our own "FISSKER" has gone 300K on a 90s something Escort using 0-20.

 

[crazyoildude]

here in nj there is a mileage maximum a cab could be driven but i have heard some of the 4.6 engines run forever. i know of one 4m6 ford truck that has 350+ and still runs good (we put valve seals in it at 225,000

 

[steve20]

Originally Posted By: tig1
Originally Posted By: steve20

Many police and cab companies that use Crown Vics have put 200-400K using 5-20 oils.

That is pure speculation on your part, so I'll add some speculation of my own: just as many PDs and cab companies have run 5-30 and 10-30 for 200-400K miles and their engines are fine as well


Thanks for backing me up that 20wt oils are equal to 30-40 wt oils.



I do not know how to reply to such a statement: 20 = 30,40 weights. I do not have the time to educate you on the difference between oil weights. Some real good beginners reading material can be found in reading Motor Oil 101

 

[CarbonSteel]

Originally Posted By: TFB1
From the above linked article...

Quote:
The engine oil is then changed every 3000 miles or every two weeks.


At that change cycle 5w-20 is no doubt fine, apparently they don't trust it to go farther and frankly I would not either...

Why is that? I run 5W-20 for 7.5K miles and my UOAs are as close to perfect as probably possible (including those with almost 100% towing in them). If it were not for my warranty, I would run it much longer per OCI. There are many persons here running 5W-20 for 10K OCIs with no issues. Do you have some quantifiable data to back up your opinion?

 

[Nick R]

the amount of ignorance going on in this thread is mind boggling

First of all,
Originally Posted By: steve20
Originally Posted By: tig1
Originally Posted By: steve20

Many police and cab companies that use Crown Vics have put 200-400K using 5-20 oils.

That is pure speculation on your part, so I'll add some speculation of my own: just as many PDs and cab companies have run 5-30 and 10-30 for 200-400K miles and their engines are fine as well


Thanks for backing me up that 20wt oils are equal to 30-40 wt oils.



I do not know how to reply to such a statement: 20 = 30,40 weights. I do not have the time to educate you on the difference between oil weights. Some real good beginners reading material can be found in reading Motor Oil 101


I find it impressive that someone that has been here since 07 would say something like this. You are seeing what you want to see. What tig is saying (unless I'm VERY much mistaken) is that 20wt is equal to 30/40wts in terms of performance in the engines. IE that an engine will last just as long, possibly longer, on a 20wt than a 30/40wt. CLEARLY you either aren't really readying, or are just seeing what you want to see, so you can make a idiotic statement like that. He was not saing that a 20wt is technically equal to a 30/40 in terms of viscosity. Seriously dude.



Originally Posted By: Garak
Originally Posted By: TFB1
At that change cycle 5w-20 is no doubt fine, apparently they don't trust it to go farther and frankly I would not either...






When I maintained a cab fleet in the 1980s, it was with 10w30 conventional (which was considered thin at the time) for 6,000 mile OCIs. If I were doing it now with 5w-20 SN/GF-5, I'd probably go longer than 3,000 miles.
]


@TFB1

Dude, you are so far behind the times it's not even funny. Hurrr 5w-20 sucks for long oci because I took a quote out of contest my point is valid". No, no it isn't. As was mentioned above, they were following the Manufacturers recommended OCI, which Ford Severe service is 3,000 on those models. THAT is why they changed it at 3k, NOT because 5W-20 is too weak. You do realize, that most 5W/10W- 30s will shear down to a thick 20wt within a few thousand miles? And those engines still works just fine? You also do realize taht 5W-20 is a much more shear-stable grade than either 30 or 40wts, which means they do not shear hardly at all, unless diluted with fuel? You accused someone of speculation earlier, and this is making you look like a massive hypocrite, because your post IS conjecture and speculation of massive proportions, whereas his really wasn't.

Both of you, LURK MOAR.

 

[TFB1]

Originally Posted By: Nick R

@TFB1

Dude, you are so far behind the times it's not even funny. Hurrr 5w-20 sucks for long oci because I took a quote out of contest my point is valid". No, no it isn't. As was mentioned above, they were following the Manufacturers recommended OCI, which Ford Severe service is 3,000 on those models. THAT is why they changed it at 3k, NOT because 5W-20 is too weak. You do realize, that most 5W/10W- 30s will shear down to a thick 20wt within a few thousand miles? And those engines still works just fine? You also do realize taht 5W-20 is a much more shear-stable grade than either 30 or 40wts, which means they do not shear hardly at all, unless diluted with fuel? You accused someone of speculation earlier, and this is making you look like a massive hypocrite, because your post IS conjecture and speculation of massive proportions, whereas his really wasn't.

Both of you, LURK MOAR.


REALLY??? Wonder if that's why I listen to a radio almost every day that has tubes in it... Do you remember those???

The article also mentioned they used 5w30 in the pre-'01 models apparently also without issue... They apparently just blindly follow specs and don't know Ford said it is OK to use the 5W-20 oils in most post-'91 engines...

I do use 5W-20 in my 81 year old mom's Grand Marquis, she just putters around town with the oil rarely getting up to temp... Me, I have modified engines that produce fairly high HP and ain't about to use that anorexic stuff in them...