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.
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.
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
Castrol EDGE or Castrol EDGE Extended Performance
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
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!
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:
& this car in the Continental Tire Sports Car Challenge using Total: