Tag Archives: mobil 1 75w90

Mazda MX-5 Miata Maintenance Day

This father’s day my friend Bill and I decided to fix another issue both of our NC Miata’s were having… my rear stabilizer links were making a clicking sound ever since we installed the Bilstein shocks. His Miata seemed to have aftermarket end links where one of them was ripped out of it’s socket because of possible incorrect install to his massive Flyin’ Miata rear stabilizer bar. So Bill ordered the parts online, came over and as soon as we got the car up on the RhinoRamps it started raining… so we went to the Diner for breakfast. On the way we also stopped by at CarQuest to pick up some more new end link nuts because the old ones on my car were showing signs of wear and I didn’t want them to get stripped. He paid $3.30 apiece at the Mazda dealer… I paid $3.30 for a box of 4 Dorman aftermarket pieces. They looked the same.

Fast forward to some better weather and replacing the end links turned out to be a rather quick job. We did Bill’s car first. Taking them off was easy. But placing new ones on seemed to look weird because they went in on an angle when attached to the stabilizer bar… I was worried if we fastened them in this condition, it was possible that they might fail again.

Luckily we had my car nearby to see exactly what they were meant to look like in correct condition, as installed from factory.

So another idea was to take mine off. Replace them with new ones. And use my old ones as guinea pigs on Bills car to see if they would last. If no failure happens after a few weeks of driving we’ll go ahead and replace them with the new ones. So that’s what we did.

Ironically though, the clicking didn’t stop once we installed new end links on my car. Turns out they were not the problem I was experiencing. Instead it appears that the actual stabilizer bar was bending in such a manner that it was making noise when the chasis of the car twisted on various road conditions, particularly when going onto uneven surfaces, like up a driveway or into parking lots, or hitting pot holes.

I was disappointed that the problem didn’t get fixed, but as we were tinkering under my car I discovered that my differential was covered in fluid and grime. It turns out that the last time I did Castrol Syntrax flush to replace the Mobil 1 75W90, I did something wrong. It’s possible I didn’t tighten the bolts enough. Or that I overfilled the differential. Or that my car didn’t like the Castrol product. I was so concerned about it, I ordered another jug of Mobil 1 since it was proven to work well for a good 20k miles, and did the flush later on in the day. So far after the test drive the car feels smooth. There’s no whine at cruising speeds. And all is well. What I’m concerned about now looking at the old Castrol that I drained from the diff, is a bunch of small aluminum shavings. That doesn’t seem normal to me.

But I guess time will tell if there’s a bigger issue.

Today was a very productive Sunday!

Mazda MX-5 Miata Maintenance Day

Today was a good day!

After the post maintenance test drive my toddler nephew exclaimed: “Oh look it’s Mia and Tia!”

Last week at the Woodcliff Lake Cars & Coffee my buddy Bill with the NC1 Copper Red Soft Top said he needed an oil change, so I volunteered to do it for him. Great! Today was the day to do it, perfect weather… lots of time since it’s the weekend, and besides the oil change we flushed the rear diff too.

Bill’s NC is pushing 104k miles, so it’s got a few more than mine. The area where the trans pairs to the engine was a bit covered with oil, which I guess may be normal for that age. It certainly looks similar as my high mileage Ford Explorer that my mom drives. There was also a lot of grime on the engine cover so I spend much of the time cleaning as the actual oil change took very little time. Actually, it took us the longest to figure out where to jack the car up correctly since his has an Appearance Package with side skirts that stick out beyond the pinch welds that I normally jack my car by.

Here’s some pix:

(first shot with my new Samsung Galaxy J3 6 “budget” smart phone)

Bill’s Miata:

The dreaded Sports Appearance package side skirts… look good from a distance, make the car seem lower to the ground, but a bit tough to work with especially when jacking the car up (and having to remove the jack leaving jack stands in place to lift the other side).

I don’t know if these openings are supposed to look like that or the previous shops/mechanics cut a piece out to get to the jacking point

The wet spot at the joint of transmission and engine

Bill lowered his car 1 inch with Flyin’ Miata Stage 2 kit, so we definitely had to use 2×4’s to get the front high enough for my jack to slide under

All done, first test drive to Advance Auto to recycle old oil and to buy gear lube to flush the rear differential.

Thanks to the great deal at Advance Auto I posted about earlier I got a chance to use both Castrol EDGE and Castrol EDGE Extended Performance + K&N HP-1002 filters on Bill’s oil change and mine…

Back in the air and leveled for the diff flush.

I was hoping that the Castrol Syntrax I used in my car’s last diff flush was going to work out but it seems to me that the quality of Mobil 1 is better so I recommended Bill get Mobil 1 instead.

Discovered one of Bill’s end links had broken off it’s mounting point to the sway bar, so he is going to order some new ones. These are the same pieces that make the clunking sound on my car ever since we replaced my stock shocks with OEM Bilstein’s.

Off on another test drive to get a feel for the rear end of the car… all Good!

Thansk for stopping by Bill!

My car is next, this time I tried the Castrol EDGE Extended Performance to see how it compares to Castrol EDGE I used for the past two oil changes. I’m assuming there will be no difference because I really don’t intend on running the car for 15k miles before the next oil change. In fact I was about 500 miles short of 5k on this one and I have no regrets, I’d rather change it more frequently then less…

This is my 3rd oil change this year, not sure if one more will be necessary before winter time… depends how many races I volunteer.