Current Events > Adding lower octane fuel than recommended...how bad is it for the car?

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Geiki Ganger 09/17/17 4:11:14 AM #1:	Car recommended 91, I added 87 when the original gas tank (with 91 fuel) was half full. What is the worst case scenario? --- Nintendo 3DS Friend Code: 3368 - 1137 - 5460 http://i135.photobucket.com/albums/q155/Gamecubesupreme/sf7y9s.jpg <cite>Geiki Ganger posted [p:886751316] in Adding low... [t:75783932]...</cite> <quote>Car recommended 91, I added 87 when the original gas tank (with 91 fuel) was half full. What is the worst case scenario?</quote> ... Copied to Clipboard!
J E S U S 09/17/17 4:12:50 AM #2:	More expensive than the money you saved on gas --- imaginary <cite>J E S U S posted [p:886751348] in Adding low... [t:75783932]...</cite> <quote>More expensive than the money you saved on gas</quote> ... Copied to Clipboard!
dodgefan91 09/17/17 4:29:45 AM #3:	Mixing it in with half a tank won't hurt anything. You wouldn't want to completely fill up with 87 or mix it on a regular basis though. Your car probably recommends a higher octane because it has a higher than average compression ratio which gives better performance, but is also more prone to pre detonation and knocking. Higher octane fuel helps prevent that (amongst other things) so you really should try to get the proper octane whenever possible. <cite>dodgefan91 posted [p:886751742] in Adding low... [t:75783932]...</cite> <quote>Mixing it in with half a tank won't hurt anything. You wouldn't want to completely fill up with 87 or mix it on a regular basis though. Your car probably recommends a higher octane because it has a higher than average compression ratio which gives better performance, but is also more prone to pre detonation and knocking. Higher octane fuel helps prevent that (amongst other things) so you really should try to get the proper octane whenever possible.</quote> ... Copied to Clipboard!
AlephZero 09/17/17 4:38:47 AM #4:	Half a tank you probably won't even notice. Even a full tank is very unlikely to cause any damage in a modern car with a knock sensor, you'll just lose performance. --- "There is value in segregation." - qwertyman2002 01001100 01010101 01000101 00100000 00110100 00110000 00110010 <cite>AlephZero posted [p:886751934] in Adding low... [t:75783932]...</cite> <quote>Half a tank you probably won't even notice. Even a full tank is very unlikely to cause any damage in a modern car with a knock sensor, you'll just lose performance.</quote> ... Copied to Clipboard!
Geiki Ganger 09/17/17 12:16:49 PM #5:	dodgefan91 posted... Mixing it in with half a tank won't hurt anything. You wouldn't want to completely fill up with 87 or mix it on a regular basis though. Your car probably recommends a higher octane because it has a higher than average compression ratio which gives better performance, but is also more prone to pre detonation and knocking. Higher octane fuel helps prevent that (amongst other things) so you really should try to get the proper octane whenever possible. AlephZero posted... Half a tank you probably won't even notice. Even a full tank is very unlikely to cause any damage in a modern car with a knock sensor, you'll just lose performance. Whew, thanks for the reply! I was so worried haha. --- Nintendo 3DS Friend Code: 3368 - 1137 - 5460 http://i135.photobucket.com/albums/q155/Gamecubesupreme/sf7y9s.jpg <cite>Geiki Ganger posted [p:886763421] in Adding low... [t:75783932]...</cite> <quote><cite>dodgefan91 posted...</cite> <quote>Mixing it in with half a tank won't hurt anything. You wouldn't want to completely fill up with 87 or mix it on a regular basis though. Your car probably recommends a higher octane because it has a higher than average compression ratio which gives better performance, but is also more prone to pre detonation and knocking. Higher octane fuel helps prevent that (amongst other things) so you really should try to get the proper octane whenever possible.</quote> <cite>AlephZero posted...</cite> <quote>Half a tank you probably won't even notice. Even a full tank is very unlikely to cause any damage in a modern car with a knock sensor, you'll just lose performance.</quote> Whew, thanks for the reply! I was so worried haha.</quote> ... Copied to Clipboard!
NurseRedHeart 09/17/17 12:19:50 PM #6:	Lower octane fuels burn less efficiently and make your engine more dirty. It's not really a problem if you get regular maintenance though. --- http://tinyurl.com/z8cf8o6 / http://tinyurl.com/jpq5l8j / http://tinyurl.com/z9y449e \ ( ' w ') / - Ah yiss! <cite>NurseRedHeart posted [p:886763538] in Adding low... [t:75783932]...</cite> <quote>Lower octane fuels burn less efficiently and make your engine more dirty. It's not really a problem if you get regular maintenance though.</quote> ... Copied to Clipboard!
darkjedilink 09/17/17 12:56:15 PM #7:	NurseRedHeart posted... Lower octane fuels burn less efficiently and make your engine more dirty. It's not really a problem if you get regular maintenance though. Not really. Lower octane fuel burns faster, meaning the compression needs to be lower in relation to higher octane for proper combustion. The 'dirty' you refer to comes from the improper combustion from not using the right fuel. Most passenger cars are built for 87 octane. Running higher octane fuel woul make the engine dirty, too, from unburnt fuel. --- 'It's okay that those gangbangers stole all my personal belongings and cash at gunpoint, cuz they're building a rec center!' - OneTimeBen <cite>darkjedilink posted [p:886765230] in Adding low... [t:75783932]...</cite> <quote><cite>NurseRedHeart posted...</cite> <quote>Lower octane fuels burn less efficiently and make your engine more dirty. It's not really a problem if you get regular maintenance though.</quote> Not really. Lower octane fuel burns faster, meaning the compression needs to be lower in relation to higher octane for proper combustion. The 'dirty' you refer to comes from the improper combustion from not using the right fuel. Most passenger cars are built for 87 octane. Running higher octane fuel woul make the engine dirty, too, from unburnt fuel.</quote> ... Copied to Clipboard!
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Current Events > Adding lower octane fuel than recommended...how bad is it for the car? (+) Yeah! (+)

Current Events > Adding lower octane fuel than recommended...how bad is it for the car?