What spark plugs should I use?

Or use the correct Denso iridium spark plug, SK16R11.

The plugs should cost ~$12 each at your Toyota dealer's parts counter. I doubt that a discount auto parts store will carry the NGK or Denso plugs, but you can call ahead and find out.

 

Spark Plug by NGK - Part 4996 - Advance Auto Parts___


6.99

 

$6.99 per plug is a great price, nice find!

Advance Auto charges $8.99 for the Denso plugs.
http://shop.advanceautoparts.com/we...E3-_-VALUE4&ci_src=14110944&ci_sku=20650339-P

 

Has anybody tried the Pulstar plugs? I their ads they use a Pruis and state that they bump gas mileage up 5mpg. Pretty expensive for plugs something like $50 for the set. Curiosity has gotten the best of me.

 

Q. If Toyota could increase the MPG of a Prius by 5 MPG for only $50, why didn't they come stock on all Prius?
A. Because it doesn't work.

You paid $22,000 to $27,000 for a Prius rated at 48 MPG, if Toyota could have sold you a Prius rated at 53 MPG for $50 more, they would have to be incompetent not to have. I am deeply suspicious of miracle cures that would only work if the manufacturer did not to know anything about the car they just made.

 

Yea add E3 plugs to that list. Wish I would have never bothered, because as mentioned on other posts the plugs installed were chosen in relation to the proportions of the motor. Believe me when I say that Toyota did their homework and made sure they were proud of what they were turning in. To think those plugs could have fried my ignition coils, according to service tech at dealership. They may work good in power equipment and off road vehicles, but not in my Prius!

 

Just wanted to chime in and say I bought four of the NGK spark plugs from Advance Auto for ~$7/each plus tax and installed them about a month ago. They have been working fine and I have no regrets! It was the best bargain I could find at the time. Sometimes Advance has a 10 or 20% discount coupon if you order online and pick up locally, which could save even more.

 

Hi Paradox,
Do you know if the NGK plug has the same service interval...90,000km?

 

Amazon has the NGK (4996) IFR5T11 for $7.73 a piece with free shipping. If you have Amazon Prime you get free 2 day shipping anywhere in US.

 

If you buy 4 of them, you qualify for free super-saver shipping anyway.