What Do You Look For In A HM Synthetic Oil ?

Joined
Sep 10, 2010
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GA.
The 2007 Sedona in my signature is pushing 200K miles and has developed a slight oil leak . The majority of this vehicles life has been with 5W20 synthetic SM rated oil and for the last 60K miles or so I bumped up to 5W30 synthetic SM rated oil (6K mile OCI's). My question is I believe it may be time to switch to a HM synthetic 5W30 (using the same OCI's + Fram Ultra filter) , so what do you look for in a HM synthetic 5W30 oil when comparing between brands ? SM Plus rated ? Some other rating ? ... M1 5W30 HM and PP5W30 HM oils are currently on rollback where I live at WM and then there is also Valvoline HM Synthetic for a few dollars more per 5 qrt jug. Thanks in advance !
 
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Jun 27, 2017
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OKC
The words "high mileage". Jokes aside, I don't think there's a ton of difference between each respective brand's high mileage oil. Personally, I like Valvoline's Maxlife, as I've heard nothing but good things about it and it's probably the most popular high mileage oil. That's just my opinion though.
 
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Nov 16, 2002
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NJ
They are all very similar - thicker base oil cut, higher detergency and added seal conditioners. I like MaxLife followed by Mobil 1 in that order.
 
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Apr 13, 2013
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Whichever one's on sale smile Although I gotta say, I really like MaxLife syn. It does the best job reducing the seeps and leaks in my Accord.
 
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Feb 4, 2018
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Berks County/Pa.
Flip a coin with PPHM & Mobil 1 HM both being able to apply rebates. Both outstanding oil companies but my preference is Pennzoil. Good luck, run one multiple oil changes before making a yes or no it does not work decision for High Mileage oil.
 
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May 25, 2005
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ROCHESTER, NY
My first recommendation it to repair any accessible gaskets w/o having to yank an engine. You know, valve cover, intake manifold gaskets, PCV valve & grommet and others that you can see & access. If there is still leaking &/OR burning oil issues then buy HM oil by price. You may find one that works better for you. I have personally tried 4 different brands and two seemed to work better than the other two. VML & PHM seem to work at slowing down my drips GTX HM & QS DEFY(a.k.a. QSHM) did not. All were dino or blends, not full syn.
 
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Joined
Jun 13, 2016
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MN
Valvoline MaxLife full syn has the best approvals and rating specs I've seen on any. Being a dexos1 Gen2, it passes timing chain wear tests and other stuff. You can be sure its performing to that level if it has been tested. Other oils its more guesswork.
 
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Aug 25, 2018
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South Carolina
The additive package currently can be different as some of the non-HM synthetics have switched over to a formula meant to meet Dexos 1 Gen 2 while the HM versions have not since not enough GDI engines need a HM oil yet. You'll find HM oils that still have high levels of Ca while their non-HM counterparts will be a more even Ca/Mg mix. When looking for a HM oil, I look for a robust detergent package with a high TBN and a viscosity in the higher end of the grade.
 
Joined
Sep 20, 2014
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Seattle-ish, WA
I look for ACEA A3/B3 rating so I know I am getting good film strength and protection (HTHS of 3.5+) within the grade. Hopefully ester oil in the syn for seal treatment. Appropriate to my climate. In your case, a 10w30 makes more sense. M1 10w30 HM would be a good candidate. It has worked very well for me in conditioning valve seals and reducing leaks and oil usage. Twice yearly rebates also make it very economical.
 
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