I did a drain/refill recently, took a sample and sent it off to Blackstone. Luckily it didn't show any problems.
I've been doing a D&R every 12K-15K miles starting at 30K, which may be overkill, but since I do it myself I see it as cheap insurance.
I'll probably stretch it to 15K-20K after seeing this.
I've been doing a D&R every 12K-15K miles starting at 30K, which may be overkill, but since I do it myself I see it as cheap insurance.
I'll probably stretch it to 15K-20K after seeing this.