ORLANDO, Fla. (AP) — Shane Lowry loves the grind of a strong test and it’s showing at Bay Hill. He had six birdies Friday in slightly tamer conditions for a 5-under 67, giving him a two-shot lead going into the weekend at the Arnold Palmer Invitational.

It wasn’t as cold as the day before. The wind was minimal. Bay Hill still had some bite, as Wyndham Clark, Scottie Scheffler and Xander Schauffele showed at various times.

Lowry, playing alongside good friend Rory McIlroy, holed a 35-foot birdie putt on the 13th and closed with an 18-foot birdie to lead by two over Clark.

Corey Conners (70) and Collin Morikawa (68) were three shots behind, followed by McIlroy (70) and Jason Day, who has reunited with longtime coach Colin Swatton and posted a 64 for the lowest score of the tournament.

“I think it’s my iron play is good, and conservative when it needs to be,” Lowry said in explaining why he enjoys a tough test. “I just like the grind of ‘pars are good,’ you know? There’s a lot of weeks out here where you shoot level par for nine holes and you feel like you’re beating your head against the wall. Whereas weeks like this, level par after nine, you’re actually doing OK. You’re a run away from having a lovely day.

“I like the type of golf where any time you break 70 you feel like you’ve had a good day.”

Lowry was at 8-under 136, the only player in the field to break 70 both days.

Eighteen players remained under par going into the weekend, and Scheffler was happy to be one of them. He had a rough time on the front nine, particularly a three-putt for double bogey on the par-3 second hole when he missed a 30-inch putt.

Scheffler, the defending champion, was bogey-free on the back nine, taking two putts for birdies on the par 5s and finishing with an 15-foot birdie for a 72. He was seven behind.

Clark was sailing along beautifully, going one shot ahead when Lowry made a soft bogey on the par-5 16th by missing a 4-foot par putt. That didn’t last long. Clark hit his drive out-of-bounds on the 15th and had to make a 20-foot putt to escape with double bogey.

“I don’t know if I’ve ever fist-pumped a double bogey,” Clark said. “I was pissed off with the tee shot, and I knew it was important to keep the momentum. Any shot is important. I don’t fist pump that much, but to me it just was more of like an internal thing like ‘Let’s go!’ And gave me kind of some momentum for the last three holes.”

Schauffele had back-to-back double bogeys and answered with three birdies in the next four holes. He wound up with a 71 and was 12 shots out of the lead, but the double major champion could claim a small victory by making his 58th consecutive cut dating to the 2022 Masters.