Is Chevron High Mileage Completely Conventional?

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Ayrton

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My favorite oil for my older car, Mobil Clean High Mileage 10w40 no longer exists.

The new one is a semi-synthetic that makes my small leak worse.

Therefore, I need to find a new 100 percent conventional high mileage oil.

Is Chevron High Mileage conventional or a blend? I really like their oils and would be happy to use this product, if it is indeed completely conventional?

Thanks for the help! The information I pulled up didn't seem to say either way.
 
If I had to take a guess, it's group II for the 10w30/10w-40/20w-50 and group II+ for 5w30. That seems to be the consensus here for Chevron oils.
 
Originally Posted By: Merkava_4
Where you finding Chevron High Mileage at ?


O'Reilly Auto Parts. On sale for $3.99 right now, regularly $5.19 or something. Not saying it's a good deal. I just need to find me a conventional high mileage anyway.

I just hope it is conventional. I'll give it a try.
 
How about an off brand like OReillys own HM or AZ HM or AAP HM etc I think they would have a far less chance of containing any synthetic---based on my own thoughts on the market---not any scientific evidence
 
I went ahead and did my oil change again last week with the Chevron Supreme High Mileage 10w40. So far, it has been working great with minimal to no leak (knock on wood).

I went back and bought the last 12 quarts they had in the back.

It is still a SM product (at least the stock they had from April 2010).

I'm scared, when they go SN if they haven't already, it could end up a synthetic-blend like Mobil's cheaper High Mileage, and then leak from my car.

It's insane how much difference an oil can make to a small leak.

If it continues to work well and not break down too quickly and start leaking, I will buy some more if I can find it and use it for years.

On my next oil change, I will do an analysis on it. I'm quite happy I could find another alternative that helps my tiny leak, but at the same time be a quality, trusted product. I really don't have to compromise.

I don't understand why everyone (oil companies) are starting to go synthetic blend on the low end products. I love my Mobil 1 in my mercedes, but for other cars some of us still need a conventional sometimes!
 
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Originally Posted By: Merkava_4
Which car did the 10W-40 go into ?


94 Altima with the KA24DE 2.4 liter engine. I know 10w-40 is an odd viscosity, but it helps. The first owner used 20w50 in this car for years (I know this is weird and posted about it before), but it was Southern California.


I will keep that QS in mind. I have found huge variances in how the different HM do in this engine on slowing or stopping the leak. The Mobil Clean High Mileage was great before they stopped it. I couldn't match its result from Castrol High Mileage or Pennzoil High Mileage.

Maybe this Chevron will continue to show its a match or even better. I notice it does start out thicker than its HM competitors slightly, so that is hopefully good too.
 
Originally Posted By: Ayrton


94 Altima with the KA24DE 2.4 liter engine. I know 10w-40 is an odd viscosity, but it helps.


I admire you for having the guts to use 10W-40 in your car and mentioning it out loud on the board.
thumbsup2.gif


Usually whenever I mention 10W-40 I get flamed for it.
27.gif
 
Originally Posted By: Merkava_4
Usually whenever I mention 10W-40 I get flamed for it.


Rightly or wrongly, 10w-40 has received a lot of grief over the years. Years back, it was flamed for the high spread. Nowadays, it's because it's pretty much obsoleted by other grades. If I want a conventional 40 weight, I'll stick to dual rated HDEO 15w40. If I want synthetic, there are plenty of 0w-40 and 5w-40 choices.
 
Originally Posted By: Garak
If I want a conventional 40 weight, I'll stick to dual rated HDEO 15w40.


Doesn't 10W-40 give you just a little bit thinner cold start up though ?
 
Originally Posted By: Merkava_4
Doesn't 10W-40 give you just a little bit thinner cold start up though ?


Yes, but not a huge improvement, and a 10w-40 isn't something I'd generally consider a winter weight. Most 10w30s are a tad thinner at startup.

If I wanted to use a 40 weight in blistering cold, I'd stick to something like a 0w-40. If I wanted conventional in the summer in a 40 weight, it would be 15w40 HDEO.

I think 10w-40 is kind of lost in the shuffle there. A 10w-40 synthetic is a waste considering one can get a better cold flow with something else, and a 10w-40 conventional could easily be replaced with HDEO. Even in my Audi oil chart, which had all kinds of oil specifications from thick to thin across hot to cold, 10w-40 was a bit of a red headed stepchild.

The only thing I've ever driven that really recommended 10w-40 was motorcycles back in the early 1980s.
 
I would think the HM additive pack would more than offset any possible leak negatives of being a syn-blend.

A very stout HM oil that is valued priced and all dino as far as I know is the Quaker State HM. It's also thick for grade.
 
Originally Posted By: KCJeep
I would think the HM additive pack would more than offset any possible leak negatives of being a syn-blend.

A very stout HM oil that is valued priced and all dino as far as I know is the Quaker State HM. It's also thick for grade.


Yes, you'd think so on the first point. However, I have thought so many times and had to change the oil within a couple weeks of putting it in, each time I have tried a synthetic blend.

It's the oddest issue with the car.



The other post, yes Mobil Super High Mileage 10w40 is available everywhere. It's a synthetic blend. They got rid of Mobil Clean High Mileage 10w40.


Yes, I don't mind admitting I use 10w-40. In the right formulation it effectively stops my leak, so I appreciate that. I know it might break down sooner with the big spread, but I change the oil pretty regularly.
 
Originally Posted By: aquariuscsm
Is one of the Max Life a dino? I was thinking they make a dino,blend,and synth.


As far as I know the "Conventional" has always been a blend they just sometimes chose to market it as a Conventional.
 
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