For the most part, all the benefits of synthetic engine oils do apply to higher mileage car engines.
If, however, the old high mileage engine is very worn (and I mean worn well beyond acceptable limits for normal operation) of if ignition or fuel system malfunctions exist resulting in contamination of the oil, then any "extended drain" benefits from synthetic oil do not apply. In such case it may be more sensible to use the least expensive oil available which meets the engine manufacturer's specifications.
Poorly tuned engines do not get good gas mileage because they are not running efficiently. When an engine is not tuned properly, it may not be burning fuel as effectively, leading to wasted energy and decreased fuel efficiency.
No, old oil can use synthetic engines
Your engine has relatively high mileage and it is not recommended to use synthetic oil with high mileage engines. The problem is many used engines will develop multiple leaks due to old gaskets. Otherwise, there is no problem not to use it. Mobil One is the best you can get. The grade you need is 5W30.
There are available many semi- and fully-synthetic oils which are formulated for diesel engines.
What oil to use really depends on the year of the car if you are asking what viscosity rating to use (example 5W-30) some engines require different ratings. If you are asking whether you should use conventional, synthetic blend, full synthetic, or high-mileage, then that depends on the mileage you have put on your engine and your own preferences.
In a Brand new engine it is recommended that you get the rings seated before you start using Synthetic oils. So run your engine for 3,000 miles and then you can switch to a Synthetic.
For 1.6 liter Vauxhall Astra cars the recommended oil choice is 10w 30. For higher mileage engines synthetic blends are also a good choice to help keep the engine clean.
Dermatitis? Engine oils are for engines not your skin.
Vertical engines produce more power than horizontal engines and horizontal engine has less power than vertical engines and horizontal engines are especially designed for better mileage Not sure about mileage but the big difference is vertical shaft goes like this | and the horizontal shaft goes like this ---- . > Lower centre of gravity.
Yes, a tune-up can improve gas mileage by ensuring that the engine is running efficiently and all components are working properly.
If Taken Care Of These Engines Will Give You Over 200,000 Miles.
Diesel engines are more efficient than gasoline because chambers are different. A diesel engine has better gas mileage.