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2012 Soul + automatic
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48 Posts
Discussion Starter · #1 · (Edited)
I drove to Las Vegas from San Diego and on interstates 15 and 215 there are a few slopes that are between 5 and 20 miles.

The only way to maintain a speed of 65-70 is have the RPMs at 3,500.

Is that bad for the engine on a Kia Soul or for any other vehicle?

When I am cruising at 70 on a flat road, the RPM is around 2,750.

It just feels like I am taxing the engine at 3,500.
 

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former owner of a 2016 Soul SX 2.0L - Caribbean Blue
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8,523 Posts
were you using cruise control when you were maintaining this speed?
 

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1995 Procharged Mustang Cobra, 2021 K5 GT Line
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I would not worry about it at all.
 

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2007 Kia Rio5, manual, roll up windows. 1996 Dodge Ram 1500 4x4, 5.9L V8
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341 Posts
I've run my engine at 2500-3500 for 500 miles towing a trailer, a 4cyl is happy at those speeds!

These aren't the old V8's of the '70s, 3000rpm is cruising speed nowadays
 

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former owner of a 2016 Soul SX 2.0L - Caribbean Blue
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8,523 Posts
Yes. I believe the RPM was lower than 2,750.

Probably closer to 2,500.
so if you are using cruising, a tip don't use it on these long grades or hill if you find its down-shifting, which increases the rpm. Due to the gearing ratio of the top two gears 1.000 and 0.772, in cruise, depending on the terrain, you could find it shifting between the two or in some cases even drop one more gear. But without using cruise you will find you can maintain the speed without it shifting the same and consequently will lower you rpm.
 

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2008 SpectraSX, 2014 Optima LX,2006 Jeep Liberty, Linux Mint Mate
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6,959 Posts
Your engine was down shifting out of overdrive...to climb the hills..
On the "flats" the tranny is in overdrive and the RPMs will drop.
Keep good oil and filters and replace them when the oil manufactor says that the oil is good for...and enjoy your Soul.
Dave
 
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