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I just bought a 2018 WRX Limited. I get it in a week or so. I have read about the 1,000 mile break in period and not revving past 4k, no cruise control, no hard braking and such. Does everyone follow this or is it just a suggestion? I read that you should run 91 Octane fuel but it also says you can run 89. Is this true? Any other advice for a new owner? Thanks.

Steve
 

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Don't run low octane fuel in a turbo engine. Run the highest available to you that isn't racing fuel.

Yes, you should follow it, but there are people who get very personal about it and ignore it.

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Does everyone follow this or is it just a suggestion?

Steve
Sorry but what's the difference?

Let's say for the sake of argument that absolutely no one on this forum follows the owner's manual.

Follow the owner's manual.
 

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Some people follow the manufacturer's instructions for break in, some do not. Premium fuel only, generally 91-93 octane e10.

The only other suggestions I have on top of the manufacturer's instructions are to do a fair amount of engine braking during break in, and change the oil (and filter) at the 1000 mile mark.
 

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I believe the general consensus is that in a pinch you can run the lower octane fuel if you are low and that's th only gas the gas station in East Podunkville has on tap . . . but it's really not good for the car as the engine is designed to run on premium fuel.

And yes . . . I followed the manufacturer's recommendations for break-in . . . figured there probably is a reason they wrote it as they did . . . and if there is ever an issue I wanted to be able to say I followed everything to the letter in terms of maintenance.
 

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A friend of mine bought a new jeep (yeah ik not a performance vehicle but still...) a few weeks ago, and I told him not to beat the piss out of the engine (he drives like an idiot) because of the break-in to avoid costly repairs down the road. The break-in is just to let the piston rings set in place, and break any metal shavings loose. It's generally a good idea to get the oil changed after you've finished the break-in because of all the metal shavings that are likely floating around in the engine.
 

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A friend of mine bought a new jeep (yeah ik not a performance vehicle but still...) a few weeks ago, and I told him not to beat the piss out of the engine (he drives like an idiot) because of the break-in to avoid costly repairs down the road. The break-in is just to let the piston rings set in place, and break any metal shavings loose. It's generally a good idea to get the oil changed after you've finished the break-in because of all the metal shavings that are likely floating around in the engine.
Those salesmen are fools, but not surprised from Dodge, Jeep, Chrysler....
 
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