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2005 BMW 130i
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112 Posts
used techron on my 130i and gained 3-4mpg (got up to 34.8 average the other day doing 60mph on the motorway), noticed a fair bit of carbon deposited on the exhaust after that tank of fuel, so seemed to clean something! bmw used to sell it with their own sticker on, released a technical memo stating it had no risk of damage to cats, spark plugs, o2 sensors... glad i used it.
 
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