I go for Shell V-Power for my M235i as it's a long-termer, so it's for the cleaning additives, rather than the RON. Fortunately, it's my second car with another for utility use, so I'm not too badly hit by the price rise impact. I think the additives are a genuine benefit, but probably not that cost-effective paying the premium if you're only going to swap it after 3-4 years.
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2016 M235i Convertible Estoril Blue & Oyster
2023 Peugeot e-208 GT (electric)
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