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Stepping it up a grade for high mileage #5350435 02/15/20 01:31 AM
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SR5 Offline OP
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The tradition here (Australia) is not to run high mileage (HM) oil, but rather step it up a grade after something like 10 years / 100,000 miles. Eg from a 20 to a 30 grade, or a 30 grade to a 40 grade oil as the car ages, and it now carries a small amount of wear.

In fact they hardly sell any HM oils in Australia, plus all oils contain seal conditioners, and I don’t believe seal conditioners do much for modern viton seals anyway.

Anybody else do the same?


---------------------------------------------------------------------------------
Valvoline DuraBlend 10W40 SN & A3/B4 semi-synthetic + Valvoline V06 synblend media filter
Re: Stepping it up a grade for high mileage [Re: SR5] #5350440 02/15/20 02:21 AM
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bbhero Online Content
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I am still running 5w30 in my car SR5... And my car is nearing 300,000 miles smile

My car hardly ever has burned much oil in the time I have had it. And o got the car with 39,990 miles when I got it. So far... So good.

Hope you have been doing good. Always good to see you on here.


Nissan Altima 3.5 Coupe
Cam2 SuperproMax 5w30 Carquest r84356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: Stepping it up a grade for high mileage [Re: SR5] #5350446 02/15/20 02:37 AM
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john_pifer Offline
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Having 225K on my Tacoma now, I've considered going to a 40W, but haven't done it yet. The truck uses zero oil, and the M1-EP 5W-30 seems to be doing fine in it.

I am a believer that heavier oils do have the potential to reduce wear, however.

It's something I've gone back and forth with. Whether to change up what I'm doing. Because, what I've done so far with my truck, has worked quite well. Only things under the hood I've had to change in almost 13 years have been batteries, air filters, spark plugs, and, I did have to change an idler pulley because the bearing started making noise.

Not even a check-engine light yet.


07 Tacoma V6 - M1 EP 5W-30, Fram Ultra, 10K OCIs, 225K
18 Civic HB 1.5T 6MT (Fiancee's) - VME 0W-20, OEM filter
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella

Re: Stepping it up a grade for high mileage [Re: SR5] #5350455 02/15/20 02:58 AM
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gfh77665 Offline
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Originally Posted by SR5

Anybody else do the same?


Yes, for a slightly different reason. I have two vehicles under warranty. Due to CAFE, they both call for 5w-20. As soon as the warranty is up, I switch to 10w-30 in hot Texas. By that time the engines will have some wear on them, and tolerances will have increased incrementally. It works out.

Re: Stepping it up a grade for high mileage [Re: SR5] #5350463 02/15/20 03:24 AM
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Silk Online Content
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Up a step ? No, but 3 or 4 steps yes.


1987 BMW R65 - Penrite VTwin 20-50
2005 Nissan Expert - 5W-30 Castrol Edge
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: Stepping it up a grade for high mileage [Re: SR5] #5350472 02/15/20 04:21 AM
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Mad_Hatter Offline
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Originally Posted by SR5
The tradition here (Australia) is not to run high mileage (HM) oil, but rather step it up a grade after something like 10 years / 100,000 miles. Eg from a 20 to a 30 grade, or a 30 grade to a 40 grade oil as the car ages, and it now carries a small amount of wear.

In fact they hardly sell any HM oils in Australia, plus all oils contain seal conditioners, and I don’t believe seal conditioners do much for modern viton seals anyway.

Anybody else do the same?

If you have a high mileage engine that means it was probably mfg some years ago and there's a good chance it has some NBR seals or a combination of NBR/FKM (Viton) seals. Even in newer vehicles NBR may be used in certain places because of it's better performance at very low temps (Viton hardens below -25c) or where the part isn't static; NBR has better resistance to tear/abrasion. While FKM (Viton) is, by design, very resistant to plasticizers/chemicals, there are some esters that will react. Whether or not that's in your HiMi formula is beyond me. You might be more apt to find them in specialty products like AT-205.

Last edited by Mad_Hatter; 02/15/20 04:27 AM.
Re: Stepping it up a grade for high mileage [Re: SR5] #5350488 02/15/20 05:37 AM
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demarpaint Offline
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I'd hold off until I had an issue that needed to be addressed. Having said that I run either 0W30 or 5W30 grade oil in all my vehicles.


God Bless Our Troops

Re: Stepping it up a grade for high mileage [Re: SR5] #5350493 02/15/20 05:55 AM
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PimTac Offline
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In the old days that was common. I haven’t had the need to step up in many years. I have also never used HM oil.


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: Stepping it up a grade for high mileage [Re: SR5] #5350497 02/15/20 06:07 AM
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zeng Offline
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Originally Posted by SR5


Anybody else do the same?

Yes, that's typical practice here .

Re: Stepping it up a grade for high mileage [Re: SR5] #5350507 02/15/20 06:35 AM
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Yes, I’ve stepped up to 5w40 during the summer months on a 6.0 Chev with 205,000 miles.

Last edited by Snagglefoot; 02/15/20 06:48 AM.

If you want the job done right......do it yourself.
Re: Stepping it up a grade for high mileage [Re: SR5] #5350509 02/15/20 06:39 AM
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hatt Online Content
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I stepped up from CAFE oil the first oil change.


2013 F150 5.0, Delo 400 XSP 5W-40, Wix 57502
2010 Camry 2.5, PP 10W-30, Mobil1 M1C-251A
Re: Stepping it up a grade for high mileage [Re: SR5] #5350524 02/15/20 07:01 AM
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ka9mnx Offline
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I generally go to a HM oil and never had to step up a grade (except my Ranger - CAFE).


2005 Ranger 3.0 - SuperTech Syn 5w-30/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Stepping it up a grade for high mileage [Re: SR5] #5350529 02/15/20 07:15 AM
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Brothers early HSV Maloo ute has over 500k Klms on BP Vanellus 15/40 all its life. He also runs Castrol Edge 10/60 in his other twin turbo LS2 powered ute since the turbos went on 10 years ago.

I did step up from Mercury 25/40 to Penrite Racing 15/50 Poa Ester oil for the 8.1 Mercruisers in my boat and noticed no top up oil was needed between annual changes compared to tops with the 25/40. Fourteen year old motors with 650 hours.

Re: Stepping it up a grade for high mileage [Re: hatt] #5350531 02/15/20 07:16 AM
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demarpaint Offline
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Originally Posted by hatt
I stepped up from CAFE oil the first oil change.

I did that with my Rubicon. I ran my Liberty on the "CAFE" oil for a few years and decided 5W30 was the better suited "for me."


God Bless Our Troops

Re: Stepping it up a grade for high mileage [Re: SR5] #5350564 02/15/20 07:56 AM
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I have never had to go to a thicker oil. If your vehicle is not burning or leaking oil I would keep running the recommended oil. If it's not broke don't try to fix it.


2005 Chevrolet Corvette
2014 Ford F-150 4x4 supercrew
2014 Jeep Grand Cherokee Limited (wifes)
2012 Honda Civic 4 door (my daily driver)
2007 Lund Tyee Grand Sport Mercury 115HP 9.8HP
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