Answers To 3 Very Important Questions Regarding Synthetic Motor Oil Changes
I received these 3 questions about synthetic motor oil change intervals today from a friendly subscriber. The questions were magnificent because if ...
I received these 3 questions about synthetic motor oil change intervals today from a friendly subscriber. The questions were magnificent because if you aren’t careful, it’s likely you’ll end up paying out the nose for products and services that have been meticulously designed to cheat you…the consumer…by selling you a product that can cause engine damage, poor engine performance, and may even leave your engine not only burning oil but a hole in your pocketbook.
Let’s stop the suspense and get to the questions…
#1 I know the 3,000 mile oil change interval is a myth for conventional motor oil but how about synthetic motor oil?
#2 When is the right time to change my oil if I have not met the mileage limit of the oil yet?
#3 If I am using oil analysis is an initial higher TBN number better?
Now those are some great questions and here are some answers:
#1 The line between synthetic and conventional oil were blurred back in 1997 when Castrol was able to get a court ruling allowing group III basestocks to be called “synthetic”. So as far as the 3 month 3000 mile myth goes I can’t make a clear distinction between conventional oil and synthetic oil. I can say generally that the 3K myth is more so a myth with synthetic. “Good” synthetic oils with a decent additive package should out last a traditional conventional oil.
Questions #2 and #3 share the common issue of TBN. It’s vital that the detergents and alkalinity in relation to TBN of the oil are provided for an anticipated duration of the oil in the engine. Motor oil additive packages are designed differently for extended change oils. To ensure that your engine’s environment doesn’t become corrosive or acidic, the TBN would be higher.
Everyday runs to drop the kids off at school or running up to the convenience store are especially rough on your engine’s oil. City driving is typically considered ’severe’ when it comes to oil change intervals. If the engine is not run and allowed to really heat up and bake out the oil then unburnt fuel and moisture dilute the oil and break it down.
For that reason it is best to start up and run down the highway for greater than say 15 minutes to really allow the engine to cook the oil “dry”.
Bottom line is if the oil is not designed for longer life with higher TBN more detergents etc then it will deplete its useful life sooner depending on your driving habits.
Additive packages in oils are very complex. Along with the benefits of additives, there are costs attached and all additives have to be balanced with the other additives. In order to get it right, the proper testing must be done.
To determine for yourself, once and for all, what your motor oil is truly doing to and for your engine you’re going to have to run it in your engine and perform your own periodic analysis. So long as the additives are properly balanced then the TBN should remain elevated longer, and protect your engine for a longer amount of time between oil changes. You can find the best motor oil review for all the different oils using a google search.
I like the extended performance Mobil 1 Synthetic oil and the AMSOIL Synthetic Oil. AMSOIL has been my oil of choice for the past 7 years for both of my vehicles and I’ve had no engine problems with either, only changing my oil in both once a year.
The improvement in gas mileage or horsepower is slight and may be very hard to detect. If you had a brake caliper dragging or if you had low tire pressure, the difference is nearly the same. When I hear people say that they felt a difference when they switched their oil or used an additive I have to chuckle inside my head.
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