Time between oil changes...
#21
6th Gear Member
7500 is the normal service mileage interval
5000 is the severe service mileage interval
Especially if I was open-tracking the car several times a year, and even if I was just autocrossing/dragracing it most every weekend I doubt that I'd let the oil go even 2000 miles. That sort of treatment is outside factory definitions of "severe service" and should be treated accordingly.
Sometimes it's better to err on the side of being conservative than to push the limits (and possibly your "luck"). Engineers and people who have ever completely spec'ed and built up their own engines from the piles of individual parts tend to feel this way.
Norm
5000 is the severe service mileage interval
Especially if I was open-tracking the car several times a year, and even if I was just autocrossing/dragracing it most every weekend I doubt that I'd let the oil go even 2000 miles. That sort of treatment is outside factory definitions of "severe service" and should be treated accordingly.
Sometimes it's better to err on the side of being conservative than to push the limits (and possibly your "luck"). Engineers and people who have ever completely spec'ed and built up their own engines from the piles of individual parts tend to feel this way.
Norm
Based on my experience with oil analysis in the nuclear industry and discussions with those providing industry training, we're all "flying blind" regarding the true condition of our oil. All of these #'s for intervals being tossed around are very conservative and simply guidelines (and good ones for that matter, since we have little else to go by despite all of the chest thumping claims by various parties) unless you go to the effort of pulling samples and having analysis performed.
These threads regarding what to use and how often is an indication of how the consumer is baffled by the oil companies hype and the car manufacturer's disclaimers. I hate to see people throw their money out needlessly but "disinformation" forces many into too conservative of a comfort zone.
#22
Other than direct trial and (hopefully not) error experience and anecdotal comments here and elsewhere, most of us don't really have enough to go on to establish different limits that remain within individual risk tolerance. That said, I won't get all nervous if I find myself a bit past either the 5000 or 7500 once in a while (depending in my case so far on the percentage of extended highway mileage).
With respect to consumer understanding re: oil - I knew a guy (a designer by trade) who got horribly nervous because at one oil change in his fairly new vehicle his sump was overfilled by about 3 fluid ounces, to the point where he eventually bled that much out after three or four days of agonizing over the whole situation. Not a Mustang, or a Ford, or even a US domestic vehicle - but still . . .
Norm
Thread
Thread Starter
Forum
Replies
Last Post
Boostaddict
Lethal Performance
2
09-08-2015 09:56 PM
zanemoseley
2005-2014 Mustangs
6
09-06-2015 12:58 PM