Fastmover
Well-Known Member
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- #1
So I just received the 645 page 2019 JL owners manual in the mail. Included was an addendum card re the 2.0L fuel requirements. While nothing has changed with regards to the ability to use 87 octane, the use of 91 octane for "optimal performance" has been clarified as follows. "This increase in performance is most noticeable in hot weather or other heavier load conditions, such as while towing".
I guess this means the performance gain with premium is marginal in winter. Thus you can use regular in winter and save money. Only pay the extra for premium in the summer should you wish a little extra power on the highway and the trails.
I guess this means the performance gain with premium is marginal in winter. Thus you can use regular in winter and save money. Only pay the extra for premium in the summer should you wish a little extra power on the highway and the trails.
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