Re: Buying, Owning, Driving and Maintaining a car in North America Quote:
Originally Posted by ToroRosso Thanks Chev, I agree.
Most of them have > 3 cars and all of them have alteast one late 80s or Early 90s F150. So the mindset could be because of that.
The last 3 changes i have carried out at 3k, i will switch to Syntehtic and do the change now at every 7.5k miles.
Since its nearing 40k, i was planning to do a preventive tranny flush as well.
EDIT: I showed them this post, so the reasoning is the oil quality start deteroriating post 3K miiles and a lot of mechanics recommend the 3K miles plus the Quality of oils used at some of the dealers are suspect. |
When switching to synthetic, i would advise you to do 2-3 oil changes earlier in order to have the synthetic oil in the whole system asap. So may be first 2-3 oil change you can do at 5000 miles. That way, engine will get use to the synthetic oil change. Then you can go back to 7500-8000 miles or a little bit more. Also, check dipstick with oil level and how black it is when you approach 7500 miles. If its in good condition, go even more and keep checking.
I have heard the deteriorating argument for long time and it shows how weird these old thinking is. It is true for older cars because as i mentioned the oil quality at that time was not as good as these days and so it would deteriorate earlier. I also have come across many mechanics who think its good to do at 3000 miles but they are old school as they work on plenty of old vehicles one of which was mine - a 98 camry amongst many older models at the shop. Also, its one way of making money for them since you will visit them frequently, they expect that you possibly will go for other services too like the tranny flush even when you don't need it.
Another thing to do is, take the oil sample and send it to blackstone for analysis of the oil. It will show you bad/good quality is after say 5000 miles or 7500 miles. Once you have it, you will know the right time to change it and how the oil is at that time.
When changing at dealer's, you can always ask them what brand and quality of oil they use. Usually, its the same grade, just different brand. How did they arrive to the conclusion that dealer's oil is a suspect? Mostly hearsay otherwise the dealer will have 1000s of engine repair claims WRT oil change. This is where blackstone comes in picture. Send them the one that you use all the time and it will show you the true results. Once you are comfortable with one, take it to dealer or other shop and give them the oil that you prefer.
Lastly, don't do a tranny flush. Just do a drain and fill of tranny fluid. No point paying for a flush when its just 40k. Obviously, if you want, you can do it at 50k which is usually the time to do a drain and fill on most newer cars. Also, that will mean you will have to postpone at least 6-8 months depending on what you drive. A great way to save money. I have seen many cars that don't do tranny flush/drain and fill till they get to 100k miles and it runs just fine.
Sorry for long post. My 2 cents if they are any worth.
Edit: Infotech just replied the same what i said and i agree with him.
Last edited by chevelle : 13th March 2013 at 00:10.
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