Ardina car care

Hi everyone,
Oil and filter change coming up for my p38 i bought ardina engine flush and oil stop leak,engine flush pour into engine leave to idle for 15 mins then drain oil remove filter and put in new oil filter, was going to put in engine stop leak when done.
Question.
Is this stuff safe for my p38, has any off you used it and found it did not harm anything,,,,,,,,,thanks again for any info.

never used it in p38 but used it once in other car it was **** never worked for me. where is your oil leak from? could you not just fix it?