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Gas - 5/14/2008 8:53:05 AM

Cali_Boy

Posts: 6
Joined: 5/13/2008
Status: offline

I usually put 89 Octane in my 03 S-type. I have also tried 91 and 87 Octane. Performance is same on all. No knocking. So why buy expensive gas?

Post #: 1

RE: Gas - 5/14/2008 10:55:15 AM

h20boy

Posts: 1292
Joined: 3/29/2007
From: Ft Worth, TX
Status: offline

I believe it is more of a long term benefit to use the recommended octane levels. Keeping the fuel system clean is important for keeping performance and fuel economy at their best. I am afraid if I use poor quality gas, I will be forced to do a fuel injection service, replace the fuel filter, possible throttle body...just doesn't seem worth it to me. It's gucci gas for me I am afraid. You can always be our guinea pig...lol?

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Post #: 2

RE: Gas - 5/14/2008 1:42:07 PM

oilman151

Posts: 132
Joined: 2/27/2007
Status: offline

Cali boy
Something to think about.
If you buy gas at 3.00 and you get 20.00 worth, You get 6.666 gals.
If you buy gas at 3.10 and you get 20.00 worth, You get 6.451 gals.
As you can see your only getting .215 gals less by buying the higher price gas. The saving is only .645 cents between the two. Buy the higher Octane and take care of your car. Is 64 cents worth the price.
Guess you never thought of it this way.
Regards

.

< Message edited by oilman151 -- 5/15/2008 12:42:15 PM >

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Post #: 3

RE: Gas - 5/14/2008 2:22:04 PM

FactoryJaguarTech

Posts: 2972
Joined: 1/6/2008
Status: offline

We see many cars coming in that use cheap gas. Injector problems, pinging, knocking, poor econmy etc.
You only pay a couple of bucks on a fill up extra. Money well spent.

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Post #: 4

RE: Gas - 5/14/2008 3:27:31 PM

reddrawf

Posts: 131
Joined: 9/23/2005
Status: offline

I tried the lower octane once I noticed a difference in performance. Since then I have stuck with the higher octane. As oilman points out it is not a huge difference in the final price. Its just harder to choke down the nearly 4.00 a gal in Dallas!

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Post #: 5

RE: Gas - 5/14/2008 7:22:59 PM

jlasoon

Posts: 21
Joined: 3/21/2008
Status: offline

Dear god I tried the cheap stuff a few weeks ago and couldn't wait to get rid of that crap. My car went from 300hp to no more the 200. Never again, my car is so use to Shell's V-power that if I put anything else in there the car suffers.

(in reply to reddrawf)

Post #: 6

RE: Gas - 5/16/2008 7:23:23 AM

M4rc3l

Posts: 95
Joined: 12/15/2007
Status: offline

I was wondering...I filled up my S-Type almost 2 months ago(I used only a quarter of a tank)I didn't drive the car and now the check engine light is on. Could it be the gas?

(in reply to jlasoon)

Post #: 7

RE: Gas - 5/16/2008 5:08:25 PM

jag_genius

Posts: 1735
Joined: 6/30/2007
Status: offline

could be anything.. gas is possible.. may just be a simple misfire..

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Post #: 8

RE: Gas - 5/19/2008 10:59:28 PM

rianbechtold

Posts: 25
Joined: 5/19/2008
Status: offline

I'm sorry, but if your car runs fine on lower octane, run the lower octane. Their are sooo many wives tales that go along with octane ratings so here is something to remeber:
1. If you run lower octane, and do not get pre-ignition, you will not gain ANY power by going with a higher octane.
2. Higher octane is NOT "cleaner". In fact, EPA regulates how clean gas has to be. And when you see advertised gasolines as being SOO much cleaner, you are usually paying for your gasoline to have water added to it.

It is quite interesting when people want to purchase higher octane fuel. If they knew the chemistry behind it, they would actually buy lower octane. Why is this? Because, simply put, the higher the octane rating, the slower the gas burns. In a simplified chemistry version, gas has basically octane and heptane. The number you see at the pump is the average percentage of octane. Funny thing is, octane burns slower.

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Post #: 9

RE: Gas - 5/20/2008 4:17:04 AM

Igloo112