Polaris SlingShot Octane Question?
We are often asked about fuel octane and the Polaris Slingshot. The engine management system can handle 87 without issue. However, there are some caveats:
Hard use on 87, especially if one’s been running 93 for any length of time, can lead to the knock control system having to engage heavily, which can be interpreted by the PCM’s (powertrain control module) monitor routines as a problem brewing, and as such result in a DTC (diagnostic trouble code) being set with attendant CEL (check engine light). It’s not something that will hurt the engine, but it will be a sudden and always unwanted surprise when that CEL pops.
Use of 87 will diminish power levels.
That said, as Slingshot’s GM engine is of relatively high compression, in this case 10.4:1, 91 or higher octane fuel is called out by GM and Polaris for the best performance. It’s a good recommendation and should be followed, especially if you drive that Sling hard.