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| Author | Topic: Grades of gas |
Larry Lord Prowler Junkie Personal ScrapBook From:Colton, CA |
posted 10-05-2005 12:05 AM
    
Over 110,000 total miles on 2 cars and I always use regular unless I'm going racing. No problems whatsoever. This message has been edited by Larry Lord on 10-05-2005 at 12:06 AM |
Kevin A      POA Site Supporter Prowler Junkie From:Gahanna, Ohio |
posted 10-05-2005 07:25 AM
I've basically used 87 exclusively and never had any pinging or performance issues. My window regulators have not failed and the chrome inner barrels of my wheels have not peeled! All using the cheap gas! ------------------ |
MIKE GATLIN               POA Lifetime Supporter Prowler Junkie From:Flushing, MI |
posted 10-05-2005 07:45 AM
quote: I suggest having your spouse do this 18-20 times. You may not see a difference but you will save a lot of money! |
Randy Cobb POA Site Supporter Prowler Junkie From:Greensboro, NC |
posted 10-05-2005 08:10 AM
I've been in the gas biz for 28 years, have attended Petro Engineering schools and countless seminars, but In the Red's above article from "Straight Dope" tells it better than any explanation I've ever seen or heard. IN MY OPINION, suggested use by auto manufacturers is mainly covering their butts and I KNOW that oil companies/distributors/retailers make FAR more $ on premium grades so their marketing is a result of that. When was the last time you saw an oil co. ad pushing their reg. grade. Ads are either generic or for premium grades. What do I use? Regular in daily drivers and prem. in the Prowler. If I wasn't in the business, reg would go into the Prowler. |
toys POA Site Supporter Prowler Junkie From:kensington Conn, USA |
posted 10-05-2005 08:19 AM
I have also used 87 Octane and have never had a problem with spark Knock, power ping or injector Problems in my Prowler. I have tried the recommended 91 octane Premium stated in the manual and as far as i'm concerned, Not enough and so little difference in Mileage and performance to make any Kind of a significant difference. For the guys running higher than 91 octane your Manual states anything higher than 91 octane is not recommended, so for the difference in price if 87 octane works for Ya go for it Toys This message has been edited by toys on 10-05-2005 at 08:20 AM |
Tytanium-K POA Site Supporter Prowler Junkie From:Sweet Home Northern Bama, USA |
posted 10-05-2005 08:55 AM
Toys, The way 'I' read the manual: 91 OR ABOVE octane is recommended...we've used 93+ ever since we got the car--absolutely NO problems experienced! I would genuinely hesitate at filling the tank with anything UNDER 91 octane!  ------------------ |
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toys POA Site Supporter Prowler Junkie From:kensington Conn, USA |
posted 10-05-2005 10:06 AM
quote: ......................................................... T-k i'm Not sure which manual your reading But This is what the Manual says and i looked in my both 2000 & 2001 Manuals. Your vehicle is designed to meet all emission regulations and provide excellent fuel economy when using high quality premium unleaded gasoline having a minimum rating of 91 octane. BUT It also says The purchase of a higher octane fuel is NOT recommended. Page 103 of the 2001 owners manual & page 105 of the 2000 owners Manual. So i'll stick with my last post since i have Had absolutely No problems using a more economical 87 octane. Toys This message has been edited by toys on 10-05-2005 at 10:40 AM |
TFischer POA Site Supporter Prowler Junkie From:Texas, USA |
posted 10-05-2005 10:57 AM
quote: Ditto - unless I'm on the track, I use regular. Every once in awhile I run midgrade on a long run. I put fuel injector cleaner in the tank with every oil change. T |
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ECurtis POA Site Supporter Prowler Junkie From:Victorville, California, United States |
posted 10-05-2005 02:11 PM
91 in the Prowler 91 in the SSR 91 in the 1999 LHS 91 in the 1999 CATERA (Otherwise Runs very poorly) 87 in the 1991 LeBaron (daily driver) E.Curtis |
GRROWL POA Site Supporter Prowler Junkie From:Herndon, VA |
posted 10-05-2005 03:48 PM
My memory is usually pretty good, and I may even be able to find this if I needed to, but here's the story that I read probably 5 years ago (right after I bought GRROWL, I read up on EVERYTHING that I could find). The engine in the prowler is the same as the 300 at the time. The 300 was designed to run on, and recommends, Regular gas. In order to distinguish the prowler engine as more powerful than the 300, they tuned, ran the tests and specified a higher-octane premium to obtain 6 extra horsepower. The engine runs fine on regular, it just gets a SLIGHT BIT less HP. Does anyone else remember reading this? -GRROWL |
DizzysHotToy Prowler Junkie From:Perris, CA , USA |
posted 10-05-2005 05:33 PM
Wow, I have spent thousands of dollars on Premium fuel for no reason in a multitude of vehicles. Thanks for all the good tips I am going to try regular in my 01 Prowler for a few tanks and see if I notice any difference. Tim |
ALLEY CAT POA Lifetime Site Supporter Prowler Junkie From:mesa, az, USA |
posted 10-05-2005 09:08 PM
GGROWL/Steve - I slightly remember reading somewhere that there was a 3 HP difference between the Prowler's HP figure and the 300 model's HP figure. I imagine that could easily be with different stock exhaust system, different air intake system, and maybe the gasoline used  |
spoons POA Site Supporter Prowler Junkie Personal ScrapBook From:West Palm Beach, FL |
posted 10-05-2005 09:29 PM
It might be a conspiracy..... How come the Chrysler 300 that has the same engine as a Prowler does NOT need 91 Octane? ------------------ |
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toys POA Site Supporter Prowler Junkie From:kensington Conn, USA |
posted 10-05-2005 09:31 PM
I can see where air intake and a performance exhaust system might boost you horsepower some what. But saying that by just running Premium Gas as opposed to regular gas will boost your horsepower up by Six horsepower is simply not going to do it!!!!. Hell i used to run high test and a whole can of 102+ octane booster in one of my other cars and she-ite i was lucky to gain even a few horse out of it
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ALLEY CAT POA Lifetime Site Supporter Prowler Junkie From:mesa, az, USA |
posted 10-05-2005 09:37 PM
Toys - that is why I mentioned that the combo of all three, [exhaust, air intake, and fuel] might make 3 HP difference |
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toys POA Site Supporter Prowler Junkie From:kensington Conn, USA |
posted 10-05-2005 09:48 PM
quote: ...................................................... AC i agree and I'm LOL Toys |
catfish POA Site Supporter Prowler Junkie From:scottsdale,az,usa |
posted 10-05-2005 10:32 PM
87 and it runs no different than w/91. ------------------ |
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GRROWL POA Site Supporter Prowler Junkie From:Herndon, VA |
posted 12-24-2005 09:23 AM
quote: Just watched "Sports Car Revolution" on the SpeedChannel. They did a dyno on a Porsche two ways - first with Premium/94 octane and then with Regular/87 octane. There was a 5-horsepower drop with Regular. They explained it as the knock-sensor retarding the timing. SO THERE! -GRROWL |
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RPL POA Lifetime Site Supporter Prowler Junkie From:Rochester Hills, MI, USA |
posted 12-24-2005 10:02 AM
The answer is a combination of factors in this instance. The Prowler was rated with premium fuel. The Intrepid with the HO 3.5 was rated with regular fuel hence the lower output rating. DCX didn't want the Dodge to be rated the same as the more expensive 300M which was rated for premium fuel. The early Prowlers had unique exhaust manifolds. The mid-year and later cars have the LH manifolds. Subtle differences in exhaust plumbing make some difference in rated power. DCX tries to make sure that all available engines will run on 87 octane unleaded fuel. There are areas of the country where premium isn't available plus some customers refuse to use premium fuel regardless of the car's rated requirements. This helps with customer satisfaction reducing the number of complaints and avoiding costly engine repairs. Electronics and knock sensor technology have made this possible. Most customers can't feel the difference in power. Personally, I would try this with a turbocharged engine but normally aspirated engines are okay to try it with. Octane is a widely misunderstood topic. The bottom line is to use to recommended fuel and no higher. Octane is the fuel's propensity to "knock" or pre-ignite. Refining and additives slow down the burn rate in higher octane fuel. Using too high of an octane fuel may actually reduce output because of the slower burn rate. For example, when they ran my Rambler engine on the dyno for the Hot Rod Magazine build-up article it had 11.8 static compression ratio. They weren't sure what fuel the it would tolerate. They hoped it would run on premium because that was the goal. All beak-in and initial runs were made with 91 octane fuel. We have 92 widely available in Michigan but Hot Rod is based in California were 91 is the widely available fuel. The engine produced the power that was published in the article with 91 octane fuel. They also ran it with 94 which is available at Sunoco stations here, 100 unleaded racing fuel and 104 just to see if they could extract more power. There was virtually no difference between the 91 and 94 but the engine made less power on both the 100 and 104 fuels. Why? The burn rate was slower and the engine didn't require the higher octane even with increased timing. They ran out of dyno time as they wanted to try 89 and 87 to see if the engine would tolerate those fuels under load. Its a lot easier to hear and instrument for knock on the engine dyno. |
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GRROWL POA Site Supporter Prowler Junkie From:Herndon, VA |
posted 12-24-2005 11:11 AM
quote: Did you add knock sensors and electronic engine control to the Rambler? If not, it doesn't apply to this discussion. -GRROWL |
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RPL POA Lifetime Site Supporter Prowler Junkie From:Rochester Hills, MI, USA |
posted 12-24-2005 11:34 AM
I stand corrected. I guess that basic facts don't matter. And yes, the engine was instrumented with a knock sensor so that we didn't have to rely upon hearing. If you've even been in a dyno cell you'd agree. Frankly, I don't need this..........have a nice holiday. |
ed monahan POA Lifetime Site Supporter Prowler Junkie Personal ScrapBook From:Cincinnati, Oh, USA |
posted 12-24-2005 12:07 PM
Bob, thanks for the info. You changed the way I was thinking. I used to use 93 all the time. 87 will do from now on. |
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GRROWL POA Site Supporter Prowler Junkie From:Herndon, VA |
posted 12-24-2005 12:19 PM
quote: No disagreement here: quote: -GRROWL |
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