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| # | Post Title | Result Info | Date | User | Forum |
| Answer to: Octane 88 not good for octane 87 engines? | 38Relevance | 3 years ago | Chuck Tobias | Submit Your Question HERE | |
| Yes, the warning has nothing to do with the octane rating. Modern engines (aside from "Flex-Fuel") are designed for a maximum of 10% ethanol contamination in gasoline. Higher levels may damage the fuel system. Most older vehicles can also tolerate 10% ethanol, particularly if rubber fuel system parts have been replaced which should be done on a decades-old vehicle in any event. I certainly wouldn't want to try a 15% concentration though. | |||||
| RE: Supercharging a 2017 Toyota Yaris iA | 37Relevance | 6 years ago | Mod_Man | Submit Your Question HERE | |
| Great post as usual my friend. The issue I see is as you said, you may be able to run 6-7psi of boost on that motor. But he will need A LOT more to get to 25% more power. Just as an example, my 2020 Accord Sport has Honda's 2.0T engine. Bone stock, no modifications, it is pushing 20.8psi through the motor at max boost and getting 256 HP. And keep in mind, we are talking about a made for boost engine from the company that has pretty well perfected the 4-cylinder motor and that has a half liter more displacement. It also costs $4000 more than Honda's 1.5T motor which uses a similar boost level to get to 192HP, again on a factory made built for boost motor AND using a turbo, not a supercharger. To get 25% gains, you practically are forced to go turbo as a Supercharger won't produce enough boost. And if you go turbo and slam 20psi through a non-beefed-up internals 1.5L 4-cylinder, well.....I mean you could do it once and it would just be a very expensive fireworks show. Lol. | |||||
| Answer to: Is 91 octane needed ? | 36Relevance | 3 years ago | avalon04 | Submit Your Question HERE | |
| ... of 93 octane gasoline with 5.5 gallons of 87 octane in your 13.2 gallon capacity fuel tank actually yields 90.46 octane, LOL. (accounting for the 0.2 gallons which would be remaining in the fuel tank if you are able to drive it to the gas pump) But I am not sure if that is how mixing octanes can be calculated or measured. I do not know the long term deleterious effects of using a lower octane in your vehicle. But if 93 is available and premium fuel is required, then the higher cost you pay now may be much lower than the cost of engine, etc. repair la ... | |||||
| '08 Honda Fit w/ 206k synth oil change intervals? 93 octane. Man trans drain/fill. | 36Relevance | 5 years ago | goatbelly | Submit Your Question HERE | |
| ... It had a fresh oil change upon purchase. I did my first oil change after 2,500 miles using Kirkland 5W-20 full synthetic and a NAPA (Wix) Platinum oil filter and am curious on how many miles to wait for the next one? Normal city/highway driving rarely shifting over 3k rpm and 75-80mph on highway very smoothly. Also, The idle was good but could be improved so the first 2k miles I used 87 octane except when using a 12 oz. Chevron Techron FI cleaner every 500 miles (4x) with a 93 octane full fill from empty. When using the 93 octane it was great and even bett ... | |||||
| Answer to: Octane Booster Question | 29Relevance | 5 years ago | DontKnowler | Submit Your Question HERE | |
| "my car requires 91octane or better"You did not indicate what country you re in. As far as I know, 525i requires the _European_ 92 octane. Off the top of my head, the European 92 octane approximately equals the US 87 octane = the US regular gas. | |||||
| Premium octane gas | 29Relevance | 5 years ago | Francesco Savanti | Submit Your Question HERE | |
| Hi Scotty, You mentioned that today's cars will run fine on 89 or 93 octane but engines that are recommended to use premium fuel will have less pick-up. Is it true that premium octane fuel burns cleaner than the low octane and will keep things from getting gunked up? Francesco | |||||
| Answer to: Octane Booster | 29Relevance | 5 years ago | Whatchamacallit | Submit Your Question HERE | |
| See below: | |||||
| Answer to: Can I switch to a different gasoline octane number? | 29Relevance | 5 years ago | Whatchamacallit | Submit Your Question HERE | |
| It says in the owner’s manual: “Select octane Rating 87 or higher. Use of unleaded fuel with an octane Rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage.” So you are fine using 87 octane. | |||||
| Answer to: Should I use octane booster | 29Relevance | 6 years ago | Kaizen | Submit Your Question HERE | |
| Use the octane the make recommends. The only reason I would use a higher octane or octane booster is if my engine was knocking. | |||||
| Recommended Octane for Holden 202 engine (1978 Holden HZ Kingswood) | 36Relevance | 5 years ago | erebusreactor | Submit Your Question HERE | |
| Here in Australia, we have 3 common octane ratings available. 91, 95 and 98. I own a Holden Kingswood from 1978 with the 202 inline 6 cylinder engine which was obviously designed to run on leaded fuel. Please keep in mind things might be different here in Australia with fuel etc. than America. My question is (I am also using a lead replacement additive) which fuel octane would be most suitable? I am not sure how high octane the fuel would be back when the car was made in 1978. For any Americans reading this, Holden was a brand under General Motors so the en ... | |||||
| High octane gas probably did some damage to my car | 36Relevance | 6 years ago | Cloud Shade | Submit Your Question HERE | |
| ... run on such gas, so everything went fine. Beforehand I had an intercooler replaced, because it started leaking. With a new intercooler, my car was still getting pretty hot, especially with 95 gas. It was very apparent when idling at stop lights - the fans were engaging and it was very noisy. My point is, on 92 gas it was better. Well, at least in terms of temperature... But when I went back to 92 to remove the overheating problem, my car lost torque. It was especially apparent when trying to start from a stand-still. Pressing the throttle all the way and ... | |||||
| Boost lag on subaru wrx turbo | 34Relevance | 5 years ago | Nayt | Submit Your Question HERE | |
| Is not STI. But yeah it had a small boost leak and it was fixed along with an installed boost restricter. It boosted well for a day or so and then it lost it's power. I had ran low octane for about 23 days and promptly changed to high. The mechanic reckoned the engine is fine and Im a bit lost that boost is down. Had it checked today for another leak and none found. This time they checked a code for a cam sensor - P0365. They found some oil on sensor and cleared the code. Test drived around the block and no engine light. I paid and took home but noti ... | |||||
| Answer to: How much boost is too much? | 34Relevance | 3 years ago | DontKnowler | Submit Your Question HERE | |
| I am not familiar with Acura engines. However just to give you some sort of a reference point: the 2.2l engine in my 30 yo Audi Avant with 340 kkm and 275 hp is still running with its stock 31 psi of boost, and the car is still on its factory motor and turbo with no rebuilds behind. .And guys I used to know increased the boost pressure on the same AAN engine to 34 psi and more, and still got 400+ kkm out of this setup. Not that their engine blew up after that - it is just that I lost contact... .So IMO for a well-built engine 25 psi appears to be a rather conservative figure. . My feeling is that the most important danger factor is not that much the turbo boost figure, but rather the torque figure. Engines seem to withstand excessive boost pressure much better than automatic transmissions can withstand excessive torque. My engine has an aftermarket chip in it, increasing the hp from the stock ca. 220 hp to 275 hp, and this chip has an additional limiter which under certain conditions artificially decreases the engine torque output to safeguard the transmission. | |||||
| Should I use octane booster | 29Relevance | 6 years ago | Lupo | Submit Your Question HERE | |
| Hi Scotty I have a question to ask you please I have GMC Sierra 1500 Denali 2017 with engine 6.2 l my question is if use octane booster that add 4 extra octane and I’m already using 93 octane gas will damage the engine? | |||||
| Answer to: Which octane fuel should I use in my 2020 Subaru WRX? | 29Relevance | 5 years ago | Dad2LM2 | Submit Your Question HERE | |
| I basically agree with Justin. Your car can mostly compensate. That said, 87 might be pushing it. At that octane, you’ll end up doing more of your driving at higher boost, which will increase chances for preignition (if only slightly) and eat up what cost savings you would have had. FWIW, I have an ‘18 WRX and have never used less than 91 octane. | |||||