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Absolutely, thats why i struggle to maintain stable temps on some of the a-roads i drive, loads of hills and off throttle slowing down.
Thats why m-way is always best as it's constant throttle and decent loading.
I know people with new thermostats are getting 90c straight off the bat. Mine does low to mid 80's-c but off throttle or slow town stuff it can easily fall into the 70's.
I'm contemplating whether to get my thermostats changed. Even tho the DPF is still purging, it's on the bubble.
-- I believe OP posted in another thread that his temps are just above the 78c required to start a DPF purge, i guarantee like mine, it will be falling below that level in less than perfect conditions. I think he's already tried a m-way drive. Perhaps a forced regen is the only way to go.
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