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Old 07-22-2019, 06:54 PM   #61
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Quote:
Originally Posted by lifespeed
I sure like the way the car runs better on premium. For some folks all they can see is the $ at the pump, they just aren't perceptive enough to notice the improved fuel economy and performance. Fortunately Ford's knock sensing is good enough to allow folks to get away with bad gas.
I 100% agree , all mine do better on Premium ( 93 ) and even better on 95

MPG , Performance , daily driveability etc all better and datalogs back it up

Tom
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Old 07-23-2019, 07:35 AM   #62
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Quote:
Originally Posted by magnetic View Post
1turbofocus

I sure like the way the car runs better on premium. For some folks all they can see is the $ at the pump, they just aren't perceptive enough to notice the improved fuel economy and performance. Fortunately Ford's knock sensing is good enough to allow folks to get away with bad gas.
I 100% agree , all mine do better on Premium ( 93 ) and even better on 95

MPG , Performance , daily driveability etc all better and datalogs back it up

Tom
Thanks but none of these seem to address how the premium gas is somehow solving the transmission failures. Yes, it's good to have a smooth running engine and if premium fuel gets you there, that's all good but how that solves the myriad of DCT issues is beyond me.
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Old 07-23-2019, 08:50 AM   #63
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Quote:
Originally Posted by magnetic View Post
With out a doubt the MK3 will make better HP/TQ , better daily driving , MPG from 93 + fuels
I have seen 100`s of datalogs of the MK3 now and many wanting 87 , 91 , 93 tunes and I have seen the datalogs from 87 to 93 and there is a difference , I totally change the way the knock sensor adjust and how it plays a role in the timing and VCT etc

93 by far is the way to go if you can afford the difference from 87 , even 91 is better
Quote:
Originally Posted by magnetic View Post
I 100% agree , all mine do better on Premium ( 93 ) and even better on 95

MPG , Performance , daily driveability etc all better and datalogs back it up
Yep, I'm with IrishBrewer on this. Your quotes are only from Tom speaking to the performance of the engine. Obviously the transmission plays a role in performance, too, but nowhere did he indicate that issues with the DPS6 are mitigated by higher-octane fuel.

All that said, if running 93+ in your Focus fixes your problem - or even gives you the illusion of a fix - go for it. It's your car. And to be honest, it's appreciated that you shared with the community that you felt there was an improvement in the shuddering when you went with premium gas. Maybe it'll work for someone else, too.

Personally, I just don't buy it. I don't want to spend $35-40 to test something that, logically, has no effect. I'm certainly not going to experience enough of an improvement in fuel economy to make up for the extra $7-8 per tank that premium would cost me.

With prices where I am (70-80 more per gallon for 93 vs 87) - and assuming a 10% bump in fuel economy - it's still 16% more expensive to run 93 (10.1 per mile with 93 vs 8.7 per mile with 87). 93 would need to cost no more than 26 more per gallon - or I'd need to get around 28% better fuel economy - to make it equitable. Neither of those are going to happen and so without any evidence (other than butt dyno) that premium is in any way better for my car or completely fixes the DPS6, it's simply not worth it.
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Last edited by rczrider; 07-23-2019 at 08:53 AM. Reason: Because I like math.
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Old 07-23-2019, 10:31 AM   #64
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Higher octane fuel will in no way fix the issues of this transmission. If it were that easy, Ford Corp would communicate this to owners. This would completely take them off the hook and provide a resolution to a seven year headache. Really, think about it.
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Old 07-23-2019, 10:40 AM   #65
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And to add, even if we were to focus on engine performance, please understand what higher octane potentially does during the combustion cycle and then apply that to THIS motors cylinder head, combustion, timing events, load/demand, A/F ratio, knock sensor, and ultimately the factory PCM strategy to name a few. Not going to spell it out so do your research. A higher octane rating is NOT a fix for this tranny lol
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Old 07-23-2019, 11:57 AM   #66
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Quote:
Originally Posted by magnetic View Post
I have a 2018. Drove for a year and started to get shudder between 1 and 2. Had the weird noise when coming to stops and delays getting back up to speed when in traffic, and it slows and speeds back up.
I switched to 93 octane, and after 4 tanks car was ABSOLUTY PERFECT. We are getting 100 degree temps here right now and the car drives perfect.
My opinion with this is the engine needs more power to run dct, and without it causes trans to shift poorly.
With 93 it holds gears better and no more noises coming to stop. Pickup is DRAMTICALLY improved . It drives as good as any traditional automatic. This is on the 2018 and I cannot speak to older versions, but this was the fix for my car.
My brother in law has a new 2018 also and is starting to have same symptoms and he is going to try 93 also, so we will see if it improves his car too.
I have a '17 SEL and based on earlier threads here I did the same when I started to notice some odd behavior at under 1,000 miles. I removed the silencer, added 93 octane and have had zero issues now coming up on 62,000 miles. I drive 120 miles round trip over mountains and through lots of rush hour traffic. I think it is a unicorn, or it will curse me and blow up this afternoon on the way home.
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Last edited by scott9050; 07-23-2019 at 12:02 PM.
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Old 07-23-2019, 12:53 PM   #67
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I have a '17 SEL and based on earlier threads here I did the same when I started to notice some odd behavior at under 1,000 miles. I removed the silencer, added 93 octane and have had zero issues now coming up on 62,000 miles. I drive 120 miles round trip over mountains and through lots of rush hour traffic. I think it is a unicorn, or it will curse me and blow up this afternoon on the way home.



What do you mean, you removed the silencer?



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Old 07-23-2019, 01:40 PM   #68
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Quote:
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What do you mean, you removed the silencer?
Haha, I read that, too. I assume they mean they did the snorkel delete.
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Old 07-23-2019, 05:08 PM   #69
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Sorry, doing Mustang speak.
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Old 07-23-2019, 06:08 PM   #70
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Like I said in my 1st post, I probably take some crap here. It works for me, and just wanted to let people know it reduces shudder and car performs much better.
You should just try it for yourself.
If it doesn't work for you, go back to regular gas. It will not hurt your car.
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