Tag Archives: K&N HP-1002

Mazda MX-5: Oil Filter Options for NC Miata

If you’ve come for a scientific comparison for the “best” oil filter to use on your next Miata oil change… you’ve come to the wrong place.

The goal of this post is to illustrate, side-by-side comparison between some of the oil filters I’ve already used on my car and some I intend to try. I have used the Mobil 1 M1-102 filter with my Mobil 1 oil changes when I first got the car in 2015. In 2016 I switched to a K&N HP-1002 filter that features a 1 inch nut on the bottom of it for easy removal. And in 2017 I purchased a cheaper version of the K&N called PS-1002 that doesn’t feature a nut on it, and is apparently of lower quality (also Made in China, not in USA like the Mobil 1 or K&N HP-1002). That said the K&N HP-1002 filters I sourced from Walmart recently must be old stock. I used a K&N filter last year sourced from Advance Auto that was made in South Korea, I believe. So these filter options are always evolving.

Here’s some side-by-side shots:

K&N PS-1002 (Pro Series)

K&N HP-1002 (High Performance)

Mobil 1 M1-102

Notice it doesn’t come with the plastic wrap to keep the dust off.

The M1-102 and HP-1002 are very alike, directly comparable, while the PS-1002 is clearly of cheaper quality. The can has a flimsier feel to it though it still has a plastic cover to prevent dust getting into the filter while its in a box.

Price wise I have purchased the Mobil 1 for around $10 from Amazon. My latest K&N HP-1002 I sourced from Walmart for under $10 apiece. I bought 4 of them to get FREE shipping. Before that I purchased the HP-1002 from Advance Auto as part of the oil deal, they were included free in the purchase of a 5QT jug of Pennzoil Platinum 5W20 oil and a rebate from the store. The PS-1002 I just bought from AutoZone who had a $3 OFF promo, the filter came out to $3.50 apiece with FREE shipping. The boxes arrived directly from K&N manufacturer in Riverside, California even though I ordered on the AutoZone web site.

As part of the same AutoZone $3 off deal, I ordered a longer K&N PS-2009 filter. I had researched on forums that the PS-1002 and PS-2009 are identical except for the volume of oil they contain. Presumably higher volume filter does more of the filtering, while flowing the oil better through the system. Or some-such…  There’s a longer oil filter option for the NA & NB Miata’s but not so for the NC. People claim that the longer filter will not fit into the tight space on my Miata. At $3.50 a pop I was willing to buy one to try it for myself. Though I have to admit that I believe the people claiming it won’t fit because my 2007 Miata has been around for ten years already, the NC was made from late 2005 to 2015, so I’m sure if they fit someone would have tried it and would have been offering them for sale to make money on this “better” option product. But again, I’ll find out for myself during my next oil change in about 5k miles.

Here’s the pix for comparison:

K&N PS-2009

And more side-by-side:

So far I have no complaints using Mobil1 M1-102 or K&N HP-1002.

Mazda MX-5: Oil Change at 5,000 miles with Pennzoil Platinum 0W20 and K&N Filter HP-1002

Update: (Feb 2017) I wasn’t sure what was causing the car to act weird after this maintenance session at Chris’s house. Now that some time and mileage have passed I think I figured it out. And the result is a few issues. 1). part of the problem was the fact we overfilled the transmission fluid during the flush. There was an issue we found with proper checking of the level (which required running the car to get it warm, and then opening the check valve). 2). my car doesn’t seem to like 0W20 weight oil. I posted a few times that I don’t like Mobil 1 and now I can add Pennzoil Platinum 0W20 to the list. Both Mobil 1 and Pennzoil Platinum 0W20 turned real dark at just about 5k miles which shouldn’t happen. This makes me believe I should totally stick to 5W20 from now on. I’ve changed out the Pennzoil from this post with Castrol EDGE 5W20 and car feels absolutely perfect!


I don’t think I’ve ever had an oil change party with friends until this weekend, where my buddy Chris with a 2008 Silver NC1 GT PRHT offered to help me flush most of the fluids on my car while performing the same service on a bunch of cars in his household.

The plan was to flush the power steering fluid and fill it fresh with Mobil 1 ATF. Flush the Automatic transmission fluid with Pennzoil Platinum High Mileage ATF, and finally change my oil with Pennzoil Platinum 0W20 that I’ve had sitting at my home since about this time last year when I got the crazy deal from Advance Auto on two sets of oils (one 5W20 which I used up during spring, followed by two more Pennzoil Platinum 5W20 changes that I bought during the summer and now for the winter decided to go with thinner 0W20).

I’ll make separate posts for each maintenance item, so click on whatever interests you most:

I must admit that after doing all these fluid changes the car feels a bit weird and I can’t really pin point what the issue is. I’m sure it is fluid related because there’s a faint drone coming from either the engine or the transmission. Note to self: next time do one fluid flush at a time so if there is an issue like this it is easier to narrow down.

But back to the oil change party at Chris’s house.

The day started with a trip to the Subaru dealership to pick up an oil filter for his XV… then Chris changed his ’08 NC’s oil using Castrol Edge 5W20 Extended which I’d like to try in my car at some point in the future once Pennzoil stops being so cheap with all of their promos. While Chris’s brother Eric did an oil change on his Mazda RX-8 Rotary with Castrol Edge 10W30.

My car was last and oil was basically the last thing we did to it, but since it was the easiest job I’ll write about it first.

I was curious to see how Chris does his oil changes and for someone so meticulous as he is, he does it very differently than I do. He jacks the front, keeps the oil cap on, undoes the drain plug, the filter, and re-installs the drain plug with a new bolt that I picked up at a local Mazda dealer for $7.99 accompanied with a $1.65 crush washer. In all the oil changes I’ve done to my car to date I never changed the nut and the washer, but since Chris was doing my car for me, I had him do the same thing he does to his car, so mine also received the new bolt and crush washer. I typically jack the car up and put it on jack stands and when the fluid drains, I lower the passenger side so more of the dirty oil comes out. Chris doesn’t do that himself, which I found to be pretty interesting. Chris was surprised that his car took more Castrol Edge oil than it normally does using Mobil 1 oil which he has used in the past. Mine took the standard amount of Pennzoil that I typically use, which is just above 4.5 QT.

Some pix from the day:

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My supplies, Pennzoil Platinum 0W20, new Mazda bolts and washers and a K&N HP-1002 filter.


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Chris’s supplies Castrol Edge 5W20 Extended Performance oil with Mobil 1 M1-102 filter.


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Eric’s choice: Castrol Edge 10W30 Extended Performance oil.

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Seeing the RX-8 up close and personal made me appreciate that car a bit more, it’s surprising how massive it is compared to the Miata

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Also pretty incredible how tiny yet thirsty the Rotary engine is.

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It felt good to finish up the day with the easiest job of the evening, the oil change… (which happened around midnight… Yikes!)

Now if only I could figure out why is my engine running louder on 0W20 compared to 5W20 and why there’s this faint shimmy going on that I could feel at highway speed which seems to come from the front of the car, around the engine area. (or possible the trans).

Click here to read about the tranny fluid flush or here for power steering fluid flush.

Mazda MX-5: Oil Change at 7,000 Miles with Pennzoil Platinum 5W20 and K&N Oil Filter HP-1002

Today was a good day to work on my car, so I did my fourth oil change, again going with Pennzoil Platinum 5W20 and K&N oil filter HP-1002. Based on a recommendation from a friend who uses this oil and filter he suggested changing the oil at 8,000 miles. But being I’m going away for a month and the car has been performing a little duller than usual over the past few days I decided to change mine at 7,000 miles.

The oil looked much better than the previous Mobil 1 I changed at only 5,000 miles. It felt more viscous to the touch and not as dark. But it was dark nonetheless so I’m happy I changed it. Car got it’s pep back as I took it for a test drive afterwards.

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I really like the quality of the K&N oil filter (HP-1002) they come individually sealed and looking inside seem to be a sturdy product. When I dumped the old oil out of it into the catch can it was thick and dirty, so the filter did it’s job well.

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One observation about the K&N oil filter though, there seemed to be some seepage from the top of it going down. There was a clear mark of oil around the rim, and some collected on the very bottom. Not particularly sure why this was. The filter was on tight!

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To remove the filter I used a mod someone posted about on Miata.net cutting the top of a bottle and placing it over the filter to remove it off the car. However, my attempt didn’t go so well, the oil was going all around the bottle contraption, so next time I’ll just remove it like I’ve had in the past without using any aides, the results seem to be just as messy.

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Engine nice and clean, next oil change will probably be in the winter.

Mazda MX-5: Oil Change at 5,000 miles with Mobil 1 Synthetic 0W-20 & M1-102 filter

File this one under the: “what have you done to your Miata today” category. I changed my oil. It was exactly 5,000 miles since the last service in April, at 37,297 miles which included several 400-500+ mile road trips Upstate New York to Watkins Glen and New England to Thompson Speedway. In fact my father and I changed the oil on both the old Ford Explorer SUV and the Miata, and I mention the Explorer for a reason, because I want to use a different oil the next time I do my service, one that doesn’t turn so dark so quickly.

mazda mx-5 miata oil change mobil 1 synthetic 1

I got a hell of a deal December of last year when walking into a local AutoZone I found a 5-QT jug of Mobil 1 on sale for $5. I bought two. This is the second jug being used. I was reading all about Mobil 1 on Miata.net, and so many people swear by it, but I don’t see what the big deal is, especially when you consider paying the full price which is typically around $27 to $35 depending on the store. The oil turned dark at only 5k miles, about the same shade of dark as the Explorer’s standard Pennzoil 10W-40 at 4k miles, and it’s not synthetic. The feel is about the same on the Miata as on the Explorer. Maybe I had unreasonable expectations for the feel from the Mobil 1.

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Mobil 1 Advanced Fuel Economy “Recommended for most Hondas and Toyotas”

But at any rate I think I’ll try something else in the spring time to at least make a comparison for myself. I will stick with 0W-20 weight and full synthetic, but will change the brand.

The options are:

Pennzoil Platinum or Ultra Platinum

pennzoil platinum 0w-20 or ultra platinum 5w-20

Castrol EDGE or Castrol EDGE Extended Performance

castrol edge 0w-20 or castrol edge extended performance 5w-20

I’m also thinking of replacing the Mobil 1 M1-102 oil filter with a K&N version, which seems like it’d be easier to install and remove when the time comes with the wrench instead of trying to work in a tight space the way it is now. The nut seems like a great idea. The filter goes for around $10 to $15 apiece, available at Walmart but probably the most reasonably priced at Moss Miata – $9.95

K&N HP-1002 oil filter

mazda mx-5 miata K&N oil filter HP-1002 k-n

So if anyone has any personal experience with the products I’ve listed above or some other products that I haven’t considered, like for example the $37 a jug Royal Purple synthetic oil, do share your thoughts… please! I would especially be interested to hear from people with a NC Miata so I can base my decisions on something concrete. A real world experience, like I got from Jason for example, Stevie – his 2009 Miata gets Pennzoil Platinum + K&N filter changed on an 8,000 mile interval. That’s impressive!

hello stevie 1 mx-5 miata

Oh yes, besides the recommendations on facebook and Miata.net I am a sucker for Motorsport advertising, hence the BFGoodrich tires for my Miata just like the BFGoodrich sponsored MX-5 Cup series cars (tires might be different but whatever). So which cars use what oil in what series? Well, this Mazda comes to mind using Castrol:

lone star le mans 6 hr of the circuit of the americas 17

& this car in the Continental Tire Sports Car Challenge using Total:

2015 petit le mans continental tire sports car challenge mx-5 miata