John's 4X4 Center
6367 Arapahoe Rd, Boulder, CO 80303 303.449.2640

Engine and Exhaust

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The “Man-Made” Engine Oil (Synthetic Oil Change)

If you own a newer vehicle, your vehicle’s manufacturer may require that it use synthetic oil instead of conventional oil.  Synthetic oils are more stable, don’t break down as easily,...
Published on: Oct 06, 2024

Motor Oil—The Synthetic Advantage (Synthetic oil vs Conventional)

You’ve probably already heard that regular oil changes are extremely important for the health of your vehicle’s engine. That’s sound advice.  But what you might not know is when...
Published on: Sep 22, 2024

Oil Change

An oil change:  Sounds simple, but there’s some important things to know about preventing oil sludge. Oil eventually starts to turn into jelly.  Literally – petroleum jelly.&nbs...
Published on: Sep 08, 2024

The Harm in Skipping an Oil Change

Some new vehicle manufacturers are now recommending much higher oil change intervals than they have in the past. As much as 5,000 to 8,000 miles or more.  Following these recommendations is very ...
Published on: Jul 07, 2024

Change Your Oil, CO Drivers!

As engine technology advances, recommended oil change intervals have gotten longer.  High quality oil in a well-engineered engine has led to extended intervals.  Here’s the problem:&n...
Published on: Sep 29, 2023

Oil Change

An oil change at your local Boulder, CO, auto shop sounds simple, but there are some pretty important things to know about preventing oil sludge.Oil eventually starts to turn into jelly, literally: &n...
Published on: Jul 22, 2023

The Maintenance Mindset For Boulder Drivers

{{ image('MzA0') }} In Boulder, we know we need to take care of our cars, but it just seems really hard to remember to do it. We generally accept that many things in life require regular maintenance ...
Published on: Aug 07, 2022

Boulder: Have You Considered Synthetic Oil?

I recently saw an ad for synthetic oil.  I really hadn’t heard about it before, so I asked by service advisor for some background.  Basically, the inside of your engine gets hot becaus...
Published on: Jul 06, 2020