Why I Switched from NAPA Gold to Baldwin Oil Filters: A Mechanic’s Honest Review

With nine gas-engined machines on my property, I spend a lot of time changing fluids and filters. While I’m not brand loyal to consumables, NAPA Gold has been my go-to oil filter for years. They were solid, readily available, and—until recently—made in the USA.

This month, when I went to restock my Mitsubishi Montero’s oil filter, I noticed the box for the NAPA Gold 1334 now read “made in China.” This small change sent me down a research rabbit hole that led me to a better product altogether.

NAPA’s Offshoring Shift: What Changed and When

NAPA’s decision to offshore filter production isn’t new. In 2023, the auto parts retailer transitioned suppliers from WIX to Premium Guard for many filters, including the 1334. Discussions about this shift have been circulating on forums for years.

I suspect I’ve been buying old stock of the NAPA Gold 1334 for the last couple of oil changes—or perhaps I simply didn’t check the packaging closely. Either way, this discovery prompted me to reevaluate my filter preferences. That’s when I remembered Baldwin, a brand long trusted in agricultural and industrial applications.

Baldwin Filters: A Forgotten Gem in the Auto Parts World

Baldwin has been a mainstay in the filter industry for years. In fact, when I first purchased my Montero around 2018, another owner recommended Baldwin filters. However, I forgot about them because they’re rarely stocked on auto parts store shelves. (For no logical reason, I prefer picking up oil, filters, and drain-plug kits in person at brick-and-mortar shops.)

The Baldwin B7243 filter, designed for my 1998 Montero’s 3.5-liter V6 engine, wasn’t as easy to find as standard oil filters. They’re primarily stocked at industrial supply sites rather than auto parts retailers. Even Walmart carries them, and they’re very inexpensive. To my satisfaction, they’re still proudly made in the USA.

Unboxing the Baldwin B7243 vs. NAPA Gold 1334

When my Baldwin filter arrived, I noticed it had a “tall and skinny” profile compared to the “short and fat” NAPA Gold unit. Both felt similar in weight, but a closer look at their specifications revealed key differences.

Three Key Takeaways: Why Baldwin Wins

Here’s what stood out most about the Baldwin B7243 compared to the NAPA Gold 1334:

• Higher Bypass Valve Pressure: The Baldwin filter’s bypass valve opens at 20 PSID, nearly double the NAPA Gold’s 8–11 PSID. This means unfiltered oil bypasses the filter at much higher pressures, which is critical for a hard-working V6 engine in varied conditions.
• Superior Filtration: Baldwin’s proprietary Microlite media offers an 18-micron nominal and 40-micron absolute rating, compared to NAPA Gold’s 21-micron nominal rating. This finer filtration captures smaller contaminants, protecting the engine better.
• Made in the USA: Unlike the NAPA Gold 1334, Baldwin filters continue to be manufactured in the United States, aligning with my preference for domestic products.

“The Baldwin B7243 contains both an anti-drainback valve and a 20 PSID bypass valve. A filter that bypasses at 8–11 psi will route unfiltered oil around the element at relatively modest differential pressures—for example, during a cold start in winter when oil is thick, or when the filter is moderately loaded. The Baldwin holds the line until 20 psi.”

Final Verdict: Baldwin Filters Are the Better Choice

After switching to the Baldwin B7243, I’m confident it’s the superior oil filter for my Montero. The higher bypass pressure, finer filtration, and continued USA manufacturing make it a clear winner over the NAPA Gold 1334. While Baldwin filters may not be as readily available at local auto parts stores, their presence at industrial suppliers and Walmart—and their affordable price—make them an easy choice for anyone seeking a high-quality, American-made alternative.