The cooling system is basically “closed”. If mineral deposits were a problem the manufactures would recommend “Distilled”.Ģ. IMHO I think potable water is just fine and not a problem.ġ. But, I have never read on a container of coolant “dilute with distilled water” and this includes the BMW container and manual. After thinking about it, I just wonder if it’s a theory that an educated car enthusiast seeking perfection thought would be a good idea without real world proof and the masses thought it sounded good. In over 40 years of dealing with cars including changing coolant and rebuilding engines I have not once come across a problem with mineral deposits in the cooling system. I have used it in the past, but only because of convenience. I do find the recommendation of using “distilled water” for topping off and/or dilution interesting. If you need more than that you are either changing your fluid or you have a problem. i dont know how low but im picking up a gallon after workīMW does sell a one liter size antifreeze/coolant (P/N 82 14 2 209 769), which after dilution will make up to two liters. So I guess we both found out Eco Pro mpg has a cost.īMW's already have high heat efficiency factored in.I just got off the phone with service dept, distilled water or bmw coolant can be used. ![]() Really? After about 4000 miles, I got around to trying Eco Pro with my temp gauge, and discovered it immediately runs up temp from about 215 deg f to 225 deg f. And we'll see if the coolant problem ever resurfaces. Right now the trip computer actually shows an even 28 for the 200 or so miles on the current tank of gas. I'll have my first big fill-up this weekend since the X1 was serviced for low coolant and the trip computer was reset. Using EcoPro my fill up calculations were usually around 27.5 (sDrive 28). I drive in Los Angeles, a lot of freeway traffic - sometimes flowing, sometimes not. But why use it if it barely makes a difference to MPG? If I don't start to notice a significant drop in MPG, I'll lay off the EcoPro, even though it's not substantiated that the low coolant level phenomenon is related to sue of EcoPro. I have stopped using EcoPro and am watching my mileage, which at the moment seems to be holding up real well. Others who got the low coolant level alert - were you using EcoPro often? I was. In regular Los Angeles driving, I average around 27.5 per refill. I'll just compare my trip computer MPG readings now to my pump calculations. I forget what the average speed was, but I know my MPG was exactly at 28, through 11,600 miles, due to one long road trip in early July where I was able to get some real highway cruising in for a few hundred miles. So before I coudl read my average speed and MPG since I bought the X1 last November. One slight annoyance - I had never reset my main trip computer, but when I got the X1 back it had been reset. But if the coolant level gets low again, I'll definitely bring up the "overflow tank" issue. They checked the whole coolant system and saw no defect. Anyway, my one year service is in two months, so we'll see. Writing it up it might come across as if he didn't take this seriously, but that wasn't the impression as we talked. He suggested that if I get the warning light again, I could either bring it in or just put some distilled water in. He didn't say anything on the EcoPro theory. "New BMWs sometimes go through a period of adjustment and things like this happen," he basically said. Here's what my SA at Beverly Hills BMW told me: the coolant was a little low but not dangerously so. ![]() I do use EcoPro on the freeway, which in LA means, I use it a lot. On another forum someone had suggested that using EcoPro uses more coolant, so I will ask the SA about that when I pick it up. I didn't actually pop the hood and check the coolant, but in the search I read where those who had done so quickly verified that the coolant was indeed dangerously low. When I got in the X1 this morning the warning light was gone, but of course I still took it in. I saw some older posts where the OP followed up later to say the problems hadn't reoccurred. Some theorize that the coolant level wasn't "settled" in production, or something like that. Apparently it is not infrequent on newer BMWs in the first 10 to 20,000 miles. Mine's an sDrive, 2013 with 11,600 miles.īy the way, a quick search last night for "BMW coolant level warning" brought up a fair number of forum hits, for other models. They have my X1 now so I'll update later. I called Beverly Hills BMW and made an appointment for this morning. Yesterday as I got in my X1 after work, I got a "low coolant level" alert.
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