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Message: <blockquote data-quote="prodigy" data-source="post: 1598854" data-attributes="member: 232">Guys,Noticed that my car's acceleration been really really slow. It wasn't like that before and the engine used to be quite rev happy and now, it feels like i'm pulling an elephant behind. BTW, i'm driving a EJ9 Civic SOHC VTEC.I actually serviced the car 3 weeks ago and could have possibly used the wrong lubes. I used Q8 F1(the gold color one bought from Eneos for RM190). Additionally, i just changed tyres from Yokohama's to Michelin and on the Yoko's i used 185/60/14 while the new Michelins are 185/65/14. I've not changed anything else in my car but just this few weeks i feel the car is extremely sluggish off the block and as a result, i'm pressing harder on the accelerator and my petrol consumption has rised dramatically. Used to be able to do like 460Km on RM75. Now only like 400Km on RM75.I'm thinking of a few reasons, please give some advise.1. Used the wrong lube oil. Maybe the lube is "too thick" for my engine. Its the synthetic blend Q8 F1 oil and its probably suitable only for high compression turbo cars. 2. My new tyres that is higher profile. Used to be 60 series, now 65 series. Bigger profile means heavier tyres. Heavier tyres will slow down the car during acceleration.3. Could be my exhaust leaking. Been noticing a slight hissing sound when i'm doing 110kmh for about 4-5 months back. Didn't gave much damn about it. Again, i'm not sure if its leaking on extractor, mid box or muffler.What could be the possible cause? Any input is appreciated.</blockquote>

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