Back to all

Proper Fluids for Your Vehicle

October 22, 2022



The automotive professionals at Tuffy St. Johns would like to give St. Johns drivers an update on some of the things happening in automotive fluids. You know, cars are becoming more sophisticated everyday - and fluids such as, oil, coolant and transmission fluid are becoming more specialized at about the same pace.

The Jacksonville do-it-yourselfer has to be pretty careful so that they do not actually harm their vehicle with the wrong type of fluid. That is why so many Florida car owners rely on the advice of their friendly Tuffy St. Johns service advisor to not only get the correct family of fluids, but to suggest the formulation that is best for their car and their driving habits.

Let's start with engine oil. Mandarin drivers who have been paying attention, will have noticed a number of new oil weights on the Florida scene in the last several years. Modern engines are built to much tighter tolerances and have very complicated valve trains. The oil must be thin enough to lubricate complicated parts when the engine is cold. The weight of an oil is expressed in terms like 20-W-50 or 5-W-30. The auto manufacturers recommend the weight of oil for each vehicle they make. The recommendation is based on engine design. Your St. Johns service center will know what weight your manufacturer recommends - and it's important to follow those recommendations. Your service advisor at Tuffy St. Johns can also offer suggestions for special formulations and can tell you all about conventional and synthetic oils.

Antifreeze,
or engine coolant, is another area that has become more complicated. For a long time, auto manufacturers only recommended a couple of different types of coolant. Now, several different formulations are needed because of the high-tech materials that auto manufacturers are using to build the cooling system. Using the wrong type of coolant can actually void your warranty, so you want to get that right.

Transmission fluid is becoming specialized as well. New transmission designs have particular requirements that require specific formulations. Recently, new, somewhat confusing, standards for brake fluid have also been released.

Not too long ago, there was a good chance that all of the vehicles at your St. Johns house would use many of the same fluids. However, as automotive technology advances, the array of basic automotive fluids you need will grow. And, some of the formulations will cost a little more. Fortunately, Tuffy St. Johns will continue to update their training to keep pace with technology so that you'll get the right fluids your car needs. It's all part of the commitment we make to your driving peace of mind.

More articles from Tuffy St. Johns

Mileage Headed Downhill? (What Causes Bad Fuel Economy?)

December 7, 2025

Name someone you know who enjoys spending a lot of money on gasoline. Yeah, me neither. Thats because it costs quite a bit to keep fueling your vehicle. One way to save money on gas is to get good fuel economy, and most of todays vehicles are designed to maximize your mileage. But you might f... More

No Fuel-ing! (Fuel Filter Replacement)

November 30, 2025

Your vehicle has a few filters you might be somewhat familiar with. Theres the oil filter that removes impurities from your engines oil, and a couple of different kinds of air filters that prevent contaminants from getting into the engine and the cabin. But you may not know that your vehicle als... More

Losing Your Cool (AC Condenser Replacement)

November 23, 2025

Its always more comfortable in your vehicle when you can control temperature and humidity in the cabin. Air conditioning, which is standard on most newer vehicles, is a vital part of that comfort, and a key component of that system is the condenser. The condenser converts the refrigerant gas into... More