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 Post subject: Placebo effect for cars?
PostPosted: Fri Jun 26, 2009 8:04 pm 
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Joined: Wed Sep 17, 2008 2:41 am
Posts: 173
Location: Canada
Because when I get an oil change, my car seems to run softer. I'm not necessarily talking about lubing up the chassis. I just think the engine runs softer and sweeter. It's gotta be my imagination.

Gotta be.

Anyone think their engine runs smoother, or maybe heavier, with new oil?

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PostPosted: Fri Jun 26, 2009 9:32 pm 
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Location: concord nh
I know for a fact that my 97 does better i usaly pick up 1-2 mpg on a oil change I think it has some thing to do with the lifters

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PostPosted: Sat Jun 27, 2009 2:05 am 
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Location: Regina, SK
Reason you replace the oil at an oil change is because the oil gets loaded with gunk, but here's the other key factor, the oil breaksdown, the antiwear, friction reduction, additives are used up, so the oil is less capable of lubricating. Which causes it to thin out or gel up, but increase the amount of power used to spin the parts.

No placebo, just cause and effect.

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My cars:

J. McBean: '98 Suzuki Swift 1.3L 16v SOHC 5sp+ "Mk5" Made in Canada
The Mini Rattler: '94 Suzuki Swift .993L 6v SOHC 5sp+ "Mk3" Made in Canada *The Winter Beater*
B. Berry: '90 Chevrolet Turbo Sprint 1.0L 6v SOHC 5sp+ "Mk2" Made in Japan

I got 18MPG in a 3cyl with a 5 speed manual 4dr, '93 Metro! :yeahyeah


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PostPosted: Sun Jun 28, 2009 7:52 pm 
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Joined: Wed Sep 17, 2008 2:41 am
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Location: Canada
Seriously tho.

Cmon it's not like older oil has THAT much of an effect, does it?

This reminds me of other placebos for cars, as in, namebrand oil, uh, hmmm. Nitrogen-filled tires. Rice stickers. Hmm. Brainstorming.

Oh, I'm a bit of a believer in where I go to gas my car up. I go to petro-canada a lot instead of grocery store places. I do think that maybe the cheap grocery store places have poorer quality benzene as well as the maximum allowable % in what the pump can fail to pump. As in, they charge me 10.5 L and I only get 10.

Hey, if you, gamefoo, boom, feel the differences THAT much, maybe I should change my oil more than every 10,000km. IT'S A HOAX!!!!!!!!!!!!!!!!!!!! THE MAN HAS YOU 2!!!

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91 Pontiac Firefly.


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PostPosted: Sun Jun 28, 2009 11:25 pm 
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Location: Palmdale, Ca
My car feels like it has more power after I wash it :wink:

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PostPosted: Mon Jun 29, 2009 1:46 am 
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Joined: Fri Jul 27, 2007 8:20 pm
Posts: 2973
Location: Saskatchewan
my placebo effect is in the lower rpms when I step on it, it almost feels as though it speeds up a little, but it doesnt.

7.5:1comp, big cam, big tires, 3.52 trans. yeah you gotta downshift alot

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PostPosted: Mon Jun 29, 2009 2:43 am 
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Location: Regina, SK
It's not a placebo if it's a reproducable cause and effect... The oil does break down, the thickeners that react to heat are polymers and break down over time, heat, use, etc.

It's well shown through independent testing that cheap dino oil has more dirt in it while it's still in the jug, won't carry as much dirt, will break down faster, will foam faster, will cause more sludge/varnish. I only change my oil every 10,000km.

Want to know how I can tell when the the 5w40, I'm running is starting to get too thin, I can hear my valvetrain tapping. Since my car has a solid adjustable tappet valve train, when the oil gets thin, it gets louder. I've had more than a few ask me if my car is a diesel. :lol:

As for washing a car and it feeling like it has more power, that has to do with dirt, and the paint surface. You'd be surprised how much weight a coat of dust can add to a car, it also creates a lot more drag than the paint with a even crappy spray on wax finish will.

O and for a comparison of oil weights:

http://www.redlineoil.com/pdf/4.pdf

Full of handy info.

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My cars:

J. McBean: '98 Suzuki Swift 1.3L 16v SOHC 5sp+ "Mk5" Made in Canada
The Mini Rattler: '94 Suzuki Swift .993L 6v SOHC 5sp+ "Mk3" Made in Canada *The Winter Beater*
B. Berry: '90 Chevrolet Turbo Sprint 1.0L 6v SOHC 5sp+ "Mk2" Made in Japan

I got 18MPG in a 3cyl with a 5 speed manual 4dr, '93 Metro! :yeahyeah


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PostPosted: Tue Jun 30, 2009 12:02 pm 
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A legend in his own mind
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Joined: Sun Mar 24, 2002 3:06 am
Posts: 3344
Location: In T-Dot-getting >35mpg in a non GTi
someone please don't say:

My car feels faster when my GF isn't in it

because then I'll think your GF is a porker.

:mrgreen:

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PostPosted: Wed Jul 01, 2009 7:51 am 
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Joined: Mon Nov 12, 2007 1:00 am
Posts: 663
Location: Lakeland , Florida
My car is weird i guess. When i put in my 25lb bottle it seems faster then when i dont have it in there :mrgreen: Remember the less power your motor makes the more you notice all the little details.


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PostPosted: Wed Jul 15, 2009 3:13 pm 
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Joined: Wed Sep 17, 2008 2:41 am
Posts: 173
Location: Canada
True that. I remember when Mythbusters did a thing on AC and if it's better to leave the windows open or use AC. So they grab the biggest SUVs with big engines and squeal the tires along this track and tried to judge how much gas the AC uses. Why would a big V8 going 60mph along a track, squealing it's tires the entire time notice a damned AC compressor? Hahahahahaha man those guys can be so dumb sometimes.

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91 Pontiac Firefly.


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PostPosted: Wed Dec 02, 2009 5:52 pm 
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Joined: Wed Jun 20, 2007 9:12 am
Posts: 724
Location: head in the clouds
Very true. My dad has a 99 Dodge Ram Cummins Turbo Diesel 6 cylinder, and there is absolutely no difference in gas mileage or acceleration with the A/C on. It's like a football player running with the extra weight of a mosquito on his back.


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PostPosted: Mon Dec 07, 2009 11:22 pm 
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Joined: Mon Dec 07, 2009 7:18 pm
Posts: 340
Location: Victoria BC
Ya myth busters think they are the cats azz. I saw the air con one... lets make a one mile run with with it on and one mile with it off and call it a scientific fact...
sometimes I am not the genyis I think I am. Ya ever knoe so much about it that you skip the abvious? My cars hate me when I wash them, they always run worse, rattle and try to get on my nerves after.

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