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Hey guys, I just wanted to weigh in here and let you know an observation of mine. I decided this fall that I'd try 15W40 in my B230F because it has some slap when cold, I drive it hard sometimes, and diesel oil has preferable qualities. The manual says it's ok for severe conditions (towing, extended hwy driving, etc). So I did a little research and decided to try Shell Rotella-T 15W40. I had been running 10W30 dino and I believe that's what the previous owners used. Well, it seems to love the Rotella! It apears to run smoother and quieter. The oil consumption is around 3/4L every 5K km which I think is pretty good for 362K (~226K mi) on the odo. Anyway, my real point is that it's been below -15C almost every night this week and close to that during the day. Around -18 last night and -20 tonight. Every morning the coolant heater gets plugged in for ~2 hours before I start the car. From all I can tell it starts pretty normal (other then a slipping belt and a little slow at first due to the cold battery). No noticeable valve sounds due to lack of oiling or anything like that. The manual says that 15W40 shouldn't be used below -15C, but I have yet to notice a problem (knock on wood). I just thought I'd let you guys know. My Volvo mechanic always says thicker oil is better (to a point of course) and he doesn't like to use 5W30 or anything lighter. I use Amsoil 10W40 in my B230FT, but thought it was pretty interesting how well the dino 15W40 works in the B230F. It's due for an oil change within the next week and I see no reason not to put fresh Rotella in.....What great cars :)
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Chris. Halifax N.S. '91 745Ti, 287K km and '91 745 NA, 362K km.
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