25,000 mile oil change??? | Ford Explorer Forums

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25,000 mile oil change???

GJarrett

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For the record, this reply came up on the "Help Me Out Guys!!!!" thread but I thought it deserved its very own thread. This should ignite a lot of discussion. I want to learn something here so let's keep open minds and be civil, OK? Check the original thread to get the complete context of the discussion surrounding this response.

Quote:

"Let me share long experience with M[obil]-1. I have used it in everythihg from a 74 Mercury Comet to my wife's 98 Buick. That includes two middle 80s Escorts, a 94 Sable and my 92 Explorer. When this oil was first marketed it was claimed that you could go 100,000 miles between changes. I don't do that, but I do change only the filter (usually FOMOCO) at 3,000 mile intervals, replacing a quart or less to top off, and do a major drain and full refill at 25,000. The Sable, for instance, went over 120,000 miles in 3.5 years on this schedule, the Comet had over 150,000, the 86 Escort did well over 110,000 and the Explorer is at 120,000 now. We live in the mountains, tempertures range from as low as 35 below to 98 above. I use my Explorer responding to recue squad calls as well as daily driving and long distance business trips. I've never burned a quart of oil in any of these cars, i've never had cooling problems (my engines run cool if anything) and winter or summer, starting is easy and quiet. I also have been running the same oil in my standby generator, and my garden tracrtor I use to push snow. One other story: A friend of mine used it in his motorcycle engine. The engine had a sight-glass to check level. He called one night in a panic because the glass wouldn't clear. I told him to wait a few hours. The oil is so sticky it takes a while to ooze down. He did, it did, and he still is running the syntheetic.
For the record, I don't work for any auto related business, or own stock in any oil company."

Hmmm.... Dead Link Removed

I just wanted to open up this thread so no comment other than:
a) I do remember Mobil's original 100k mile claim (before they figured out they would never sell any oil if no one ever changed it); and
b) assuming that syns don't break down very fast, I see validity in changing the filter to remove the impurities the oil picks up while keeping the oil; but
c) this was the first post by this nameless person and I assume some of us would be curious to know who he/she is.

LET THE THREAD BEGIN! Dead Link Removed



[This message has been edited by GJarrett (edited 01-25-2000).]
 



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I just would like to say this and only this... His/her story may have some validity to it but I dought it. I think alot of the engine oil changing depends on how the person drives and the general quality of the car. You can get 1000 cars from any auto maker and have out of those 1000 say 100 of them are of a better quality. A friend of mine works in a machine shop and I know that they have a certain tollerances that they have to follow. Some jobs may be more than others and depending on who on the assembly line gets the part determines how good of quality it is. I think the same goes true with cars and that some people can get 120K Miles out of a car without changing the oil.

Anyway, I must let you all know this...

No I'm not the nameles person... I am who I claim I am and the following did happen.

I had something happen to me a couple weeks ago that you all may find suprising...

I was driving up the interstate doing about 70 MPH when I looked up and glanced into my rear veiw mirror. I noticed a cloud of white smoke behind me. It took me a good 5 minutes to realize that it was indeed me that was smoking... So I began to panic. I pulled off into the right hand lane and checked over my gauges real closely... I then noticed my oil pressure gauge jump... Then it stayed on the red. I left the engine run and began to pull off to the shoulder and immiadiately killed the engine. I then looked under my truck and noticed that the drain plug missing and a drip from where the plug should of been... I had no oil. I got a new plug, filled it back up with oil and started it. I drove it that night and then changed it immiadiately the following day. I have no noticeable nocking or pinging... I was shocked that I didn't kill my engine.

All I have to say is I'm a proud user of Penzoil every 3000 miles...

That's my two cents...

Happy wheelin,

Joe Dead Link Removed
94 Explorer XLT
4" Superlift Suspension
33X10.50 BFG AT KO
 






I had a 1988 Bronco II. At 30,000, I converted it to synthetic oil after it developed a valve tap on start up.

Immediately after the synthetic oil change, the tap was gone. Every 10K I did a full change and at 5K intervals changed only the filter and of course added 1 quart of synthetic oil.

At 105K miles, with still no valve tap, I sold the vehicle to my Aunt. Believe it or not, as of this date, the vehicle does not burn any oil between 10K mile oil changes has never been rebuilt.

From 30K to 105K miles, I used Amsoil, Castrol, Mobile One and Penzoil synthetics. Basically, what ever name brand synthetic was on sale or had a rebate. In addition, I used AC, FRAM and Motorcraft oil filters. Same deal, what ever was on sale.

Several months ago, I purchased a 1991 Explorer with 100K miles. Runs great but I am hesitant to convert to synthetic oil due to potential oil leaks at this mileage. I currently run synthetic oil in my 1999 Olds Cutlass.

There really is no additional cost involved using synthics. Sure, synthetics are $4.00 a quart but the added mileage obtained between changes justifies the cost! Most importantly, I am not under the vehicle every 3K miles with oil in my face!!!

Good luck.


[This message has been edited by Dr.Doug (edited 01-26-2000).]
 






well I change my oil every 3000to 4000 km NOT MILES and use ONLY valolione 10w30.
every car i own have own or will own will run the same type of oil(this goes for my father to)
 












Been around the oil industry in one form or another all my life (a long, long time). We all change oil too often. Right after Mobil came out with their 100K change policy a friend bought a new car and attempted to follow the 100K routine; not changing the oil but changing the filter every 25K and adding a replacement quart of oil. He checked the compression every 5K and plotted it on a graph. You could watch the compression track downward until he needed a overhaul at about 75K. Engines are built better now, but it does illustrate a point.

Oil really never wears out, but remember the additive package is consumable. Because synthetics are so viscosity stable there are less additives in them and therefore there is less to be consumed. Adding the extra quart periodically replaces some of the package. The real benefit of synthetics however is their ability to withstand thermal stress, hot or cold. The argument synthetics shouldn't be used until the engine is broken in because their inherent slipperyness makes proper break in impossible is a wive's tail. If that were true Corvette or Porsche would't use it as a first fill from the factory. Synthetics just get where then need to be and do the job they are chartered with, better, particularly in hot and cold weather.

How often should you change...well, that depends upon how you drive. Mostly stop and go then more often, mostly trips then less often. The only REAL way to find out for you it is via regular spectroanalysis; about $10 a pop, say every 10K. Some new vehicles have an onboard computer that measure cold cycles, length of trips, etc. in making a determination as to oil change interval. Even the Explorer EB and Ltd. do this on a 7,500 mile scale. BMW also does it as do MB's MLs. Of note MB shortest interval is over 10K for dino oil (12K I think). What does that say about how often we change our oil. I don't think mfgsare going to be overly optimistic with regards to oil change intervals just because of the libility issues.

By the way, the "W" on the oil can means the oil has passed the SAEs standard winter flow test. That is also why single weight oils will say 10W, 20W, and so on, but you will not find a 40W. Only 40. You engineer types out there will know exactly what that test is, I've forgotten - another senior moment.

There are two good articles on the subject of oil. The new Automobile magazine has a short one page article about Mobile One (Red cover with Ford's Focus on it), and the July 1996 Consumer Reports. Go to the library to find that one.

One thing to think about. Think about what a 100K change interval is asking you to do -- Don't change oil for 100K and hope you don't have problems. The alternative is to change every 5K at a quick lube place for $20 ($400 over the 100K life) and know you will not have an oil related problem...you decide. Jim
 






Whoops..."wive's tale" not wive's tail. Another senior moment...and how many of you caught that... Never mind, don't answer. Jim
 






Thanks Jim,

Now that's some good information we can all think about & use.

Thanks for taking the time to help.
 






Hey gang,

I had a 86 Mazda B2000 that I got about 280k out of before I retired it for my 91EB. I ran Valvoline and Catrol 10w30 in it and changed the oil every 3000. Filters were the Fram Extra Guard and now the Purolator Pure One. Since moving to FL from CA I have noticed that the "dino" oil came out more like water than in Ca.

Now that I have the 91EB I still change the oil every 3000 but use the Castrol Synthetic with the Purolator filters. It seems to survive the heat a bit better.

Sure the cost is more dumping the synthetic every 3k but it is still less expensive than taking it to a shop for an "dino" oil change and a dixie cup filter.

Bottom line is I don't mind spending a little extra now as I believe I'll be spending less later or even much later. (Call it a warm fuzzy feeling) I am convinced that all manufacturers, especially car makers, operate under planned obsolecense. Anything I can do to get around that makes me happy.

Best regards.
hg
 






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