Great topic, thanks for asking a question that impacts many of us! I do have a floor jack but haven't tried it yet on my IS-F... looks like I might have to replace it with a low-profile version.
As for the pinch weld point; You might be right that it should be designed to handle the stress, but since a lot of us have a lot of money tied into this vehicle... and it weighs about 3800 lbs, I sympathize with wanting to keep it perfect and its a little scary to push that much stress on a single point...
(I have not tried the OEM jack yet)

 

I always used a regular floor jack or low pro on the pinch point and it's been fine.

 

Like most of you I already had a floor jack, but it was not nearly low enough, nor long enough, to lift the center jack point forward of the oil pan. I also had the same problems with the old jack sometimes bending the pinch welds. The below solves both issues.

For the pinch welds I bought something that looks like a hockey puck, but with a slot cut into the top side that goes around the weld itself.
~10 dollars for the slotted puck





For the mid-frame jack point (forward of oil pan) I bought a extra-low clearance floor jack and a regular old hockey puck to go into the "cup" of the jack.
~$4 for the puck.




and $224 for the floor jack.

 

Heh yeah, its rare. Too much time in OT pretty much guarantees a ban elsewhere when I post now.

 

Is your car lowered or stock height? I'm looking for a new jack now that I'm lowered on Penske coilovers.. This might be just the ticket Even if it only fits under stock height, it should be fine in conjunction with my homemade mini-ramps.

-Mike

 

I am looking for a floor jack and also came across the same offer at Costco. Please let me know how you like the $99 Arcan floor jack (from Costco). Thanks.

 

Stock height. Note that it will scrape the plastic shields on the bottom but not damage them in any way. I don't think you would have any issues when lowered when using this jack + wooden stepper ramps.

 

I feel your pain.

 

Works great, best of all it has Costco warranty. If you end up not liking it, or it breaks....take it back.

I was looking at basically the same model on Amazon that sells for $249....$99 was a great deal.

 

just need to get a low profile jack.

Little off topic but I will be ordering these as my F's jack pints are all bent up.

http://www.shopfigs.com/v1/index.php...product_id=188

 

Reviving this thread. Came across these photos of an ISF on a lift and they were not using the pinch welds. Seems to be holding just fine and it would make jacking in a driveway easier if these points can be used for jack stands.

 

that’s where I put mines