With summer approaching and gas prices soaring, some families may wonder whether to put off that summer vacation.

But smartphone apps can save travelers money at the pump by helping them locate the cheapest gas in their area.

Jim Murphy couldn't resist stopping by beautiful Multnomah Falls on his way to drop his daughter off at Eastern Oregon University in LaGrande.But it was a long drive and after heading back to Bend. Filling up wasn't cheap.

Probably $150 bucks, I would guess, said Murphy.

KGW put the Gas Buddy smartphone app to the test to find the cheapest gas prices in the Portland area.

According to Gas Buddy , the cheapest gas in Portland on April 27th was at the Costco on NE 138th Avenue at $3.75/gallon. But drivers had to travel eight miles off the freeway to get there. In Gresham, the cheapest gas was $3.75/gallon at the Arco on 24235 SE Stark, but it was five miles off the freeway.

In Beaverton, the cheapest gas was $3.77/gallon on 14555 SW Tualatin Valley Highway, but travelers had to drive five miles to get there.

Is the extra drive really worth it?

Driving a few blocks further to save five or six cents is worth it, said Marie Dodds with AAA.

Jim Murphy is skeptical.

I don't think it's worth driving all over the place to look for the cheapest gas, said Murphy.

The experts say avoid freeway gas stations and use grocery store reward cards. They usually give you up to $.10 off per gallon.

Experts also say remember warehouse stores like Costco. It's also best to use low octane fuel because there are few models out there that demand premium gas.

Gas-tracking apps:

KGWNews app

Gas Buddy Apps

KGWReporterAnne Yeager contributed to this report

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