[jfamondone]

Hello All,
I have a 2015 KIA Cadenza, Luxury Package, 5,500 miles on the clock, I have noticed over the last few days a slight vibration \ heartbeat in the front driver seat when stopped at a stop light. Not smooth anymore like if the car was not running. This very slight, has anyone else experienced this issue? My 2013 Hyundai Genesis was so smooth at a stop, that I did not think the car was running. I do use a top grade gasoline 87 octane, should I try a bottle of the additive that KIA suggests at oil change? Or is this normal, If it is, I don't like it.
Thanks in advance for your replies.
John:|

 

[funnyman7915]

Hello All,
I have a 2015 KIA Cadenza, Luxury Package, 5,500 miles on the clock, I have noticed over the last few days a slight vibration \ heartbeat in the front driver seat when stopped at a stop light. Not smooth anymore like if the car was not running. This very slight, has anyone else experienced this issue? My 2013 Hyundai Genesis was so smooth at a stop, that I did not think the car was running. I do use a top grade gasoline 87 octane, should I try a bottle of the additive that KIA suggests at oil change? Or is this normal, If it is, I don't like it.
Thanks in advance for your replies.
John:|

Gosh I use regular on my K900 V6 which is only as of yet available in Canada .Should I be using higher Octane ?

 

[Scynthyace]

I use 92/93 in mine, and I still get it. Let of your brake just slightly and see if it stops like mine. I believe its just engine vibration.

Mine happens more often when its humid then when its dry out, but its definitely had my sitting there wondering if people could see my car vibrating.

 

[sh30469]

I've noticed it very rarely myself lately. And you don't have to use anything higher than regular unleaded (87), it's what the engine is rated at and you'll just be pouring money down the drain (burning it?) as it will just run rich and not burn it all. If it's a Kia 3.3L engine in your K900 I wouldn't think that you'd need to use anything higher than 87 but you may want to consult your manual. Also, Kia does recommend that you put in Techron at every oil change service interval.

 

[gene]

K900 uses a 3.8 liter V6. Uses 87 octane

 

[MadMax]

I've never experienced this vibration at idle, but then I often use gas treatment, chevron tecron and seafoam...engine runs real smooth all the time.

 

[Scynthyace]

I've noticed it very rarely myself lately. And you don't have to use anything higher than regular unleaded (87), it's what the engine is rated at and you'll just be pouring money down the drain (burning it?) as it will just run rich and not burn it all. If it's a Kia 3.3L engine in your K900 I wouldn't think that you'd need to use anything higher than 87 but you may want to consult your manual. Also, Kia does recommend that you put in Techron at every oil change service interval.

I use the 92/93 because its what my company pays for, and its a habit from all my other cars needing it. They get fussy if I don't use 92/93 because apparently they get some kinda fleet pricing on just the top-grade... Who knows! All I know, is gas is free, and I get better mileage out of 92/93 than I did out of 87/89 -- 80 miles better to a tank actually. /shrug

 

[Bike Effects]

I use the 92/93 because its what my company pays for, and its a habit from all my other cars needing it. They get fussy if I don't use 92/93 because apparently they get some kinda fleet pricing on just the top-grade... Who knows! All I know, is gas is free, and I get better mileage out of 92/93 than I did out of 87/89 -- 80 miles better to a tank actually. /shrug

I used to watch an Acura forum (Acura's require Premium fuel) and there were those that tried Regular and lost significant mileage. I have my first road trip coming up in the Cadenza, Norcal to Seattle and back. Maybe I'll use Regular on the way up and Premium on the way back. That would be an interesting test. My guess is mileage will be better. The question is, will it make up for a $0.20 a gallon difference in cost??

 

[Scynthyace]

I used to watch an Acura forum (Acura's require Premium fuel) and there were those that tried Regular and lost significant mileage. I have my first road trip coming up in the Cadenza, Norcal to Seattle and back. Maybe I'll use Regular on the way up and Premium on the way back. That would be an interesting test. My guess is mileage will be better. The question is, will it make up for a $0.20 a gallon difference in cost??

I've found at $.20 more per gallon, with a fuel economy in town of 26mpg, that's less than $.02 a mile, and its really only like $3 more in total cost for gas when filling my tank.

 

[Eddyx]

I just took delivery of my Cadenza about a week ago. I did notice the vibration/heartbeat from the engine and thought it odd, was going to mention it to the dealer at first oil change. Otherwise I love the car.

 

[sh30469]

I certainly notice it more when it's hot/humid out. Haven't felt it in a bit since it's been a bit colder out. Doesn't seem to impact performance. Also, I filled up with 93 from Shell and didn't notice any type of mileage increase. Lent my car to my parents to drive to TN and told them I had just filled it with 93 and let me know what the mileage was and total gas input/price while filling. They took that to mean that I wanted them to put 93 in the whole way... The good news is that 93 there was cheaper than 87 here . I'm back to 87 now, nice not paying $0.50/gal higher per fill.